Motifs of Invisible Man Essay

Throughout Invisible Man by Ralph Ellison the narrator battles many battles continuously. These motifs that all compile into the very many themes of the literary work. The motifs range from blindness to invisibility even to the racism keeping our narrator from discovering his true identity. Blindness is the most used motif in Invisible Man. The narrator and his peers are always battling blindness throughout the novel. Throughout the novel blindness is a problem because willfully avoid seeing and confronting the true problem. †Within the American conscience with such an intensity towards his predicament† (Forward Page 2). During the time period the moral blindness of whites was a major problem, but so was the blindness of blacks. Many of the brothers remained blind to the true problem they were confronting. Also blindness takes a few literal turns. One during the â€Å"Battle Royal†, when the boys fight blindfolded, and the second the statue of the founder is described as â€Å"not having eyes†. Blindness also literally suffers from blindness. The motif, blindness, tells us about the actions and feeling of the society. The second major motif is invisibility. Not only is it in the title, but this topic plays major role throughout the novel. The book starts out with the narrator saying â€Å"I am an Invisible Man† (page 3). This motif continues to appear all the time until the epilogue. The motif of invisibility goes hand in hand with moral blindness. While blindness has a bad connotation, Invisibility can bring freedom and mobility. †I’ve overstayed my hibernation, since there’s a possibility that even an invisible man has a socially responsible role to play† (Page 571). The narrator realizes that being invisible may be a safe position, but he would never be able to make a major impact in the world. Although he is comfortable as an invisible man he emerges to go make a visible impact on the world. The last major motif, Racism, is an obstacle to finding individual identity. Throughout the novel he struggles to find his true identity. As he passes from minor society to minor society he tries to adapt their identity on to him. Each time he takes away from his individuality. The narrator finally realizes that racism just causes him to see what others want him to see. He comes to this realization when he says â€Å"and I knew it was better to live out f one’s own absurdity than to die for that of others, whether for Ras’s or Jack’s† (page 559). In the end he chooses to be productive by making his own contributions to society; force others to acknowledge, and to clarify the reality of thoughts outside of their prejudiced notions. The narrator battles blindness of others, the comfort of invisibility, and the obstacle blocking his own personal identity. Throughout this coming of age novel the narrator losses many battles, but in the end he finally wins. He ends as a visible advocate staying true to himself.

Hnc Accounts †Business Law Outcome Essay

There are two institutions in the UK that have the power to make statutory legislation in Scotland. The first of these institutions is Westminster (London) where elected individuals serve in the House of Commons. These members are known as MP’s (Members of Parliament). Parliament is responsible for passing new laws (legislation). In the late nineties the House of Commons allowed the passing of devolved powers to the newly created Scottish Parliament. Only certain powers were transferred to Holyrood and Westminster still control the laws that govern Tax, National Security and many others. Westminster is still regarded as Primary Legislation. This means that any law made by Westminster in reserved matters of policy must be adhered to by the Scottish Parliament. The second of these institutions is Holyrood (Edinburgh) where 129 elected individuals serve in the Scottish Parliament. These members are known as MSP’s (Members of Scottish Parliament). The Scottish Parliament was created on the 11th Sept 1997. The voters in Scotland took part in a referendum where they voted on a Devolved Scottish Parliament. This meant that Westminster would allow this devolved parliament to create laws in certain areas of policy. The Scottish people voted for a devolved parliament and the devolved powers were transferred from Westminster to The Scottish Parliament on the 1st July 1999. Westminster reserved certain powers that still govern many areas of Scotland today but the devolved powers allow Scotland to pass laws and regulate in areas such as Agriculture, Health and Housing to name a few. The process of making primary legislation in the UK follows a very strict procedure of three distinct stages. An MP, Lord or a member of the public can raise a bill to suggest a change of law (legislation). The first stage  of the process involves a parliamentary committee of members. They will review the bill and decide whether it moves to the second stage. The second stage allows amendments to the bill and allows the bill to be scrutinized by the committee and member. If the bill passes this stage then the third stage involves a member vote. If a majority of the members vote for the bill then the bill will be passed and presented to the Queen to receive a Royal Assent. The bill is now law. Common Law has a major role in Scots law today and it draws on four separate elements. Common Law is often referred to as the ‘Unwritten Law’ or ‘Historical Law’. This unwritten law has developed over centuries and draws from different sources. 1. Common law is based on Equity. Equity is the process of allowing judges to apply fairness or justice when there is no legislation to refer to. They must base these decisions on fairness and equality for all. When the judge follows this process of Equity he/she is actually making the law. This is called Precedent and we will talk about this in more detail in point 4. 2. Common law is also based on Institutional Writing. Centuries ago men of a higher class would finish their schooling in the various cities of Europe. These men would learn the laws of other countries and on their return to their estates in the UK would write about these laws and use them to govern their own estates. Institutional Writings no longer hold the authority as days gone by as Government Legislation and Judicial Precedent are supreme and overrule Institutional writings if they are based on similar cases. 3. Common Law is also based on Custom. Custom is when over a long period of time a particular habit is recognized by the people or social grouping. An example of this would be ‘common law husband’ where the couple are not in fact married but have lived as such so therefore the man would be entitled to the same rights as a legal husband. 4. The most important piece of common law in the courts today is Judicial Precedent. Judicial Precedent is where a judge or jury has no other legislation or act of parliament to decide a particular dispute and any decision they make will be followed in the future for any other similar disputes. A precedent can only be superseded by a higher court, government legislation or act of  parliament. Judicial Precedent tries to keep the law stable. Consistency through the court system is vital when trying to uphold the virtues of Fairness and Equality. The four key institutions of the European Union are the Council of Ministers, European Parliament, European Court of Justice and the European Commission. Each of these institutions has a representative from each member nation to allow a voice from each of the member states. The European Commission along with the Council of Ministers can change and amend laws within the European states. The Commission, unlike The Council of Ministers, has the power to change Regulations and issue Directives (these are orders passed by the European Commission or The Council of Ministers to ensure legislation is implemented within all the member states). If a state, company or persons break or do not comply with European law then it is the European Commission who will raise a court action against those who are not complying. The Council of Ministers is the legislative body of the EU. They are head of decision making and law/regulation introduction in the EU. They are the most powerful of all the institutions in Europe. Although the Council has the highest power there are still areas of legislation that the Council cannot pass with the advisory input of the European Parliament. The European Parliament is to advise and make recommendations to the Council of Ministers in various areas of legislation. They will review any piece of legislation or directive and give their opinions on the matter. If the Commission does not implement the recommendations of the Parliament then they must advise why they have not done so. The Parliament cannot change, implement or make European law and are there solely as an advisory Parliament. The European Court of Justice is the highest court within the European states on Community law (laws that have been issued by the Commission or Council of Ministers). If a state, company or persons fail to abide by the regulations  and directives issued by the Commission then it is the Court of Justice responsibility to ensure the law is observed. The Commission will initiate the proceedings and allow the member state an opportunity to defend itself against the complaint. If that process does not result in the breach being rectified the action will then go to the Courts of Justice. There are two main types of European Legislation. They are Directive & Regulation. 1. Directive legislation allows the European Commission to give a timescale for a piece to legislation to be introduced. Directives are issued to ensure that law is common throughout the European Countries. They keep the peoples equality to fairness and equality protected throughout the member states. If a country does not adhere to these directives sanctions can be issued. 2. Regulation Legislation is required in an emergency situation or crisis. They must be acted upon immediately by the state that the order is against. An example of this would be the BSE crisis in the 90’s when an immediate ban was put on the importing and exporting of beef from the UK. All member states had to adhere to this regulation to ensure that British beef stocks did not contaminate the other member states beef stock.

Articles of Confederation vs. the Constitution Essay

Articles of Confederation vs. the Constitution - Essay Example The Constitution granted the federal government the right to act directly on individuals and states. It provided the legislative basis for creating the Supreme Court, which granted the federal courts the possibility and the right to try the individuals who broke federal laws.The Constitution of the USA also granted the citizens of the country the possibility to affect the policy of their country more directly, as it stated that the state Representatives should be elected by the popular vote unlike the Senators, who are appointed by state legislatures. The Constitution also took the duty of the adjudicator of disputes between states from the Congress and granted it to the Supreme Court. As we can see, the Constitution made a lot of changes in the legislative, executive and forensic system of the USA, it made the connection between the states much tighter, thus making the country more powerful, established the new rights of the Congress and gave it the right to regulate the most import ant processes within the country, which allowed to make the power more centralized.

Corporate governance board in an organization operates via the Essay

Corporate governance board in an organization operates via the different members of board of directors - Essay Example The aim of this paper is to illustrate the working of corporate governance by means of the literature review. Corporate governance rules are settled by the directors who give rules and regulations for the firm to move it in a specific direction to achieve different goals. Corporate governance actually gives rules for internal control of the firm. This literature review shows different views on corporate governance of various scholars i.e. the point of generation of this idea and its history. The paper then elaborates on the principle of corporate governance and their responsibilities; two distinctive models are described for corporate governance, which are used all over the world. These models clearly defines that why the firms in the United Kingdom are not as powerful as in United States. The reason is provide latterly in the paper by showing different examples of United States industries that actually fails because their corporate governance was unable to work. Then what are corpor ate governance model used by the Asian companies are provided. The paper uses three different examples to show that either corporate governance work or not. ... The last section is the few lines defining the conclusion taken from over all paper. The paper uses the examples of real firms that show that either corporate governance work or not. These real examples show that how their corporate governance works so that we can conclude that either the concept of corporate governance work or not. Corporate governance concept does work but it all depends on the individual forming the board of director or corporate governance. Corporate governance ideology does work and that is the reason that why the top firms are still working. The best direction and decision making system is the only reason that works and all these are provided by corporate governance. The paper not only shows that the either corporate governance work or not rather it also provide that how corporate governance work. The examples of real firms that are taken to elaborate the aim of paper will clearly define that how their corporate governance working for the success of the firm. Fro instance, the example of Cadbury shoes that their corporate governance decided to separate the confectionery firms from the beverages firms and this decision really works and the firm actually gain profits. Different statistical data of the companies are provided by the paper that shows that impact of decision making and regulation provided by corporate governance. The approach to literature review is made by the use different scholarly piece of work. Different books are used to elaborate the topic and scholar's journals are sued to seek the issue discussed by this paper. Moreover, the paper uses the real firm's data showing the actual and real evidences that either the corporate work or not. This data is taken from different

Academic Honesty Paper Essay Example | Topics and Well Written Essays - 1500 words

Academic Honesty Paper - Essay Example As such, academic honesty is required, because truth begets honesty. Without honesty, an academic paper, even how superbly it is written, would be a trash unworthy of space in any academic journal. There are various ways in achieving academic honesty in a paper: (1) the use of truthful information, (2) acknowledgement of sources, and (3) the author of the academic paper. Of the three, the first two gets the utmost attention, perhaps because these are easier to evaluate, especially with the current technology that enables easy detection of plagiarism. The last one rarely becomes an issue, not unless the author of the academic paper cannot in his/her own capacity explain the paper (Walvoord & Anderson, 2010, p. 138). An academic paper should be founded on truthful information. This implies three academic actions. One, the author should verify the correctness of any data before these are used in the paper, because an assertion that is based on incorrect data is indefensible. It can be e asily disputed. It’s just like building a house on a shallow ground that a simple natural calamity could bring it down. In this case, the paper is a failure from the start. Two, manipulation or suiting data to the author’s predetermined assertion constitutes dishonesty, whether or not data used are correct. Why this is so lies on the fact that it violates the truthful process of academic investigation – Data are gathered, verified, sorted out, interpreted and analyzed. Three, data should not be concocted, because even a fiction paper needs truthful data to be convincing. How much more for an academic paper that is supposed to investigate reality in search of truth? Instead of truth, what can be found from concocted data are myths and imaginations, which are what academic papers meant to debunk. Therefore, academic honesty means honest investigation. It is only in going through this compelling process of honest investigation that one can be able to produce a genu ine academic paper. Perhaps one would ask; what has the process of investigation anything to do in making an academic paper truly academic? This question essentially hits the essence of academic honesty which is learning. Why in the first place are academic papers required? Precisely so, it is one of the ways of learning where one is compelled to integrate theory and practice; where one is trained of the discipline of scholarly study; where one is taught how to discover new knowledge or to better understand knowledge; and where one is developed of values scholars should possess, such as inquisitiveness, perseverance, integrity, fearlessness and accuracy. Thus an academic paper is not simply a paper. It essentially reflects one’s level of knowledge and also one’s character. In other words, anyone committing academic dishonesty could only be perceived as dishonest, irresponsible, and weak – characters which are unfitting for scholars. This is what justifies univer sities in sanctioning students found guilty of academic dishonesty, because the act violates the very essence of academic study. To make an analogy: a student committing dishonesty is just like a law enforcer violating the law he/she is supposed to enforce. One may argue that if the essence of going through the process of investigation is learning, then learning could be done in short cut, especially if one has gone through the same process for many times. Why not? One may take that risk. But doing so might also result to missed new insights, because as everyone knows, there are no exactly similar things. In other words, one may have experienced undergoing a thorough investigation, but every single experience, whether or not the

Korean history (Old Joseon to the Joseon dynasty) Essay

Korean history (Old Joseon to the Joseon dynasty) - Essay Example The religious factor played a fundamental role in the unification and the cohesion of the Korean society during the Old Joseon to the Joseon Dynasty. The adoption and subsequent internalization of the Confucian religious and social doctrines served as a major milestone in the unification of the Korean society during the Joseon reign. This is because, the Confucian religious doctrine was redefined after it was adapted in Korea, to entail five very basic principles that henceforth served to ensure that the Korean society remained in cohesion, regardless of the age or the social class that individuals belonged (Kim & Park, 23). To achieve the stabilization of the Korean society back then, the Confucian ideals were pitched on the principle relationships of husband and wife as the basic relationship within a family that sought to keep the family unit bonded together, such that external influences and invasion or any other form of external infiltration could not enter and divide the society. Secondly, the Confucian religious doctrine established the principle relationship as that of the young to old, where the young people were supposed to respect the elders and tore the line of the cultural and social principles that were represented by the elders in the Korean society (Kim & Park, 36). This way, it became possible to establish a respectable society that ensured that the even where any form of dissent would emerge between the young generation and the older generation in terms of the administration of the society, there were already predetermined avenues that prevented such dissent from simmering into rebellious levels that could destabilize the society (Kim & Park, 29). This way, the Confucian religious doctrine ensured that the society remained united, and the dissents that emerged were handled through the rightful channels. Additionally, the Confucian religious

Strategic Planning Essay Example | Topics and Well Written Essays - 250 words - 1

Strategic Planning - Essay Example External environment must be analyzed by the organization to determine how n organization can survive in the midst of the competitors. Implementation of strategy- strategy implementation entails the act of putting strategy into practice. In addition, the process involves steps development, methods and strategy execution procedure. The process also includes determination of which strategy to come first. Prioritization of strategies should be based on the seriousness of all issues underlying. Strategy evaluation- this element entails the examination of strategy implementation as well as the strategy outcome. Evaluation includes the process of finding out whether the deadlines have been met, whether the process used in implementation steps and process are working the way they should. Strategic management is a crucial part of organizational business strategies. For any organization to successfully survive in a competitive business environment, it has to gather the right information so that the organization can have a competitive advantage to compete against its competitors. Organizations survival deeply depends on how it outshines its competitors. If the competitors outperform the organization then, it fails. A good strategic management is, therefore, vital for an organization to strengthen its operations in the market. Business models offer a description of how an organization structure is set to maximize the profits. On the other hand, business strategy is used to give a description of how organization engages its competitors. A company like amazon and Facebook has been able to beat their competitors through development of new strategies. Facebook has been successful in increasing its revenue through virtual property owner

Environmental focus - The Rights of Nature Latin America Essay

Environmental focus - The Rights of Nature Latin America - Essay Example Sumak Kawsay is a Quechua language, which is being spoken by the South American people. Sumak Kawsay is a Latin term, wherein Sumak means good and Kawsay means living, hence together the word means good living. Environmental right concept has been introduced in the Bolivian Constitution along with the Sumak Kawsay conception with minor variation. However, the same constitution confers the right to the people to exploit the nature. Therefore, there lays tension amid the welfare affairs of state and the right of nature1. According to Eckersley, an Australian researcher, deciphered that environmental catastrophe is occurring in every count. In his research, he pointed out the conglomeration of political, environmental and ecological thoughts that bridge the gap persists amongst these and also outlines the green political viewpoint. He also pointed out that environmental calamity is a threat to human life, which is not regarded as a scientific trouble, but involves literary and trait structure. He further emphasised the need for trans-evaluation and undergoing through new eco-centrically based thoughts and assessment2. The Western world witnessed the need to protect the environment from varied catastrophes. Pesticides, nuclear control plants, noxious squander dumps and large size industrial contamination among others contribute into catastrophic destruction of the nature. In the present scenario, political and environmental theory are blended together to develop environment based consciousness amid the people. The environment concept is the basis of the current legislation made by distinct nations while legislating in any particular affair3. With this concern, the essay intends to make an environmental focus on the rights of the nature with special attention to Bolivia. Various significant aspects including depicting about the representativeness of the nature, factors promoted the constitutional change to include the rights of nature in

Standard Deviation and Outliers Assignment Example | Topics and Well Written Essays - 250 words

Standard Deviation and Outliers - Assignment Example Thus, it can be seen that a single point that is far away from all the points increases the standard deviation by a big amount that is from 1.58 to 6.68. Therefore, there is a great impact of the new point on the standard deviation. b) Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1. Use the 2nd chart to create a second data set with 8 points that has a mean of approximately 10 and a standard deviation of approximately 4. What did you do differently to create the data set with the larger standard deviation? (4 points) Notice that the standard deviation is 0. Explain why the standard deviation for this one is zero. Do not show the calculation. Explain in words why the standard deviation is zero when all of the points are the same. If you don’t know why, try doing the calculation by hand to see what is happening. If that does not make it clear, try doing a little research on standard deviation and see what it is measuring and then look again at the data set for this question. The standard deviation is zero when all of the points are the same. This is because standard deviation measures the individual data point deviation (variation) from the mean value. The standard deviation is a single number that helps us understand how individual values in a data set vary from the mean. When all the points are same, then the mean value will be also the same point and hence deviation of all the data points from the mean value will be zero. Since, the deviation of all the data points from the mean value is zero in this case; therefore, the standard deviation is zero when all of the points are the same. When all the value are the same then mean value, will be also the same and hence the value of for individual data point will be zero, and the sum will be also zero. Therefore, the standard deviation is zero when all of the points are the same. 3. Go back to

Human Behavior in an Organization Essay Example for Free

Human Behavior in an Organization Essay In an organization there are lots of factors to be considered for the company to achieve its goals and objective and succeed. These factors include communication, motivation, leadership skills, personal characteristics of employees, interaction between and among employees and teamwork. Communication is significant in transferring information because the information to be transferred must be precise and accurate to avoid miscommunication. Failure to communicate proper information might cause a negative long-term effect on the company. Furthermore, miscommunication may result to personal conflicts between members of an organization. Persons or employees in the organization must feel motivated to achieve the goals and objectives that should be met. This motivation may come from personal factors, such as for family and self-competence, or external factors, such as salaries or benefits are tied to performance of doing a job. Highly motivated members are the ones who mostly done their job efficiently. Management must motivate employees for them to do their jobs efficiently and effectively so as to lessen any probable negative impacts to the organization. There is always a person or a group of persons that will initiate any activities done by an organization and we usually call these people as leaders. A leader must be sensitive to feelings of others but not to the extent that it would prejudice any undertakings made by the group. We see different kinds of leaders, there are those who are autocratic or who don’t listen to what others has to say but there are also those that listens, hears and considers the point of view of others. Conflicts may arise in an organization primarily because of the personal characteristics of each employee that are not acceptable to others. This should not be done because everyone is different in his or her own way. Conflicts between employees would result to negative effects that would cause to fail to meet the objectives. These problems between members must be resolve to build a better relationship between them and to be able to prevent this problems to arise again in the future. In any activity that an organization should do, teamwork must always be present. This is very important to achieve the organization’s goals and objectives efficiently. In a team, each one must do their part to help achieve the goal and not help prejudice the activity. In a team, together everyone achieves more, which means that if members would just work together, all of the objectives, even the least important objective will be met. There are weaknesses and strengths inside a group and this must be taken into considerations, to eliminate these weaknesses and improve those strengths. Team building activities may be done by the organization to improve the relationship between and among members so as to have a team that works together for a common goal. Hence, goal congruence arises, which is very important factor that must exist inside the organization. Thus, proper communication, motivation, leadership skills, relationships between members and teamwork must exist within an organization. In this way, any goals and objectives of the organization will be met. As long as each one of the members do their parts well, nothing could go wrong and the organization will be successful in any activities they will undertake.

The Impact Of Extended Discussions Tourism Essay

The Impact Of Extended Discussions Tourism Essay One of the reasons why it is so difficult to achieve sustainable tourism development in first place is that there is no set definition for it. In the early 1990s, there were more than seventy existing definitions of sustainable development (Holmberg and Sandbrook, 1992). Regardless of the wide academic attention the term received, there is no consensus over a set definition, policies or measures (Berno and Bricker, 2001). As Muller (1994:134) points out there are too many experts with too much advice on the one hand and too few agents with too few resources and too little time to act on the other. The subject matter has been researched by many academics and it has reached a point where too many theories have been put forward, and not so much action (Pearce, 1989). The subject of tourism development may be viewed as in two means: as a process or as a state. In both cases the focus is on the relationships between development and tourism, and what their impact on destinations is (Pearce , 1989). Butler (1993:29) argues that there is no set definition of what tourism development is and how it should be implemented, however the author points out the importance to take into consideration the relationship between tourism, other activities and processes, and the human and physical environments in which tourism is taking place. Sustainable development received a lot of attention over the last decades by private and public sectors, governments, non-governmental organisations and it has evolved over three decades from an environmental issue to a socio-political movement for beneficial social and economic change (Farrell and Twining-Ward, 2003:275). The fact that it was adopted by such a wide variety of organisations proves the ambiguity of the term. Its vagueness is demonstrated by the most widely used definition of sustainable tourism development, proposed by the World Commission on Environment and Development sustainable development is not a fixed state of harmony, but r ather a process of change in which the exploitation of resources, the direction of the investments, the orientation of technological development, and institutional change are made consistent with future as well as present needs (WCED, 1987:9). The complex correlation between environmental, social and economic development poses a global challenge on sustainability nowadays (Potter et al., 2004). Development and growth are often used as synonyms; however there is a significant difference in their meanings (Holden, 2008). Development is defined as the continuous and positive change in the economic, social, political and cultural dimensions of the human condition, guided by the principle of freedom of choice and the limited capacity of the environment to sustain such change. (Sharpley and Telfer, 2002: 27). Since the end of the Second World War, many development theories emerged, all of them encompassing different approaches to tourism development such as: modernisation theory (1950s-1960s); dependency theory (late 1960s); neo-classical counter revolution theory (1980s); and sustainable development theory (late 1980s). Development is often associated with developing countries; however it is a term that affected global development at all levels (Potter et al., 2004). At that time developing countries were expected to catch up with the West and enter modern age, so that developme nt was linked to modernisation, which was then related to westernisation. During this period of time one of the main paradigms of development emerged the theory of modernisation (Sharpley and Telfer, 2002). It is an optimistic thesis, which assumes that underdevelopment could be overcome through modernisation from the West to less developed countries and from urban areas to rural (Elliott, 2006). However, modernisation has both positive and negative impacts, and this was the case of tourism in Crete. Tourism development was concentrated on the demand side, attracting as many tourists as possible at that time, and resulted in environmental and cultural degradation (Andriotis, 2003). Adams (2001) argues that sustainable tourism development at present is still underpinned mainly within the industrialised North and West part of the world. It is also portrayed as a EuroAmerican paradigm and a Western construct (Cater, 2006:24). Due to the economic and industrial growth in the 1950s, many natural resources have been used in unsustainable ways, without any environmental concern (Elliott, 2006). These negative aspects have resulted in a call for sustainable development. Consequently, different theories were developed in order to try to establish set guidelines of how sustainable tourism should be developed (Sharpley and Telfer, 2002). In 1994, Muller has introduced the magic pentagon as a conceptual framework of sustainable tourism development. The pentagon consists of the following five angles: economic health; subjective well-being; unspoilt nature/protection of resources; healthy culture; optimum satisfaction of guest requirements. The idea of the framework is that in order to maintain sustainable tourism development these five angles must be balanced, enhancing the positive relationships between them. However, in reality numerous factors may perhaps make it quite difficult to balance all angles of the pent agon and achieve sustainable development (Muller, 1994). Mowforth and Munt (1998) also proposed a list of tools for achieving sustainable tourism and it includes the following factors: area protections, industry regulation, visitor management techniques, environmental impact assessment, carrying capacity calculations, consultation/participation techniques, codes of conduct, sustainability indicators. Many other frameworks were suggested over the years and despite the great progress of academic research in the subject field, there is still a debate on what practices should be embedded to encourage sustainable change (Elliott, 2006). The growing demand for international tourism over the last decades has raised a great concern of how tourism activities change the cultural and environmental assets of destinations. Many tourist areas began to receive negative destination image by unsatisfied tourists. This was the case with the Spanish coastal area of Costa del Sol, as environmental decay and poor image have combined with overcrowding and low safety and hygiene standards, together with the popularity of cheaper forms of accommodation and catering, to reduce the perceived attractiveness of the region (Barke and France, 1996: 302). In the end of the 1990s some tour operators, airlines and hotels for the first time took actions against their negative impact on the environment. This was as a result of eco-tourists boycotts against the unsustainable practices of tourism providers. For example businesses have been put at risk by tourists riot in the ski resort of Vail in Colorado, in 1999 (Holden, 2008). However, Sharpley (2009) argues that there is a lack of proof that sustainable principles are adopted in the business practices of tourism organisations, at present. He also emphasizes on the disparity between the concepts of tourism and sustainable development, arguing that the perception of sustainable tourism is anything other than a myth. A case study of the impact of international tourism on the economy in Turkey showed that despite the significant development of facilities along the coastline, development had many negative impacts on the rural regions of the country. Because of the large investments in the resorts, rural areas were left behind and disparities amongst regions and classes were encouraged (Tosun et al., 2003). Robinson (2004) is another author who doubts sustainable development because of its vagueness, green-washing and possible delusions from the real problems related to tourism activities. Mass tourism activities have been viewed as highly unsustainable and after great critici sms other forms of more sustainable tourism have emerged, such as ecotourism or responsible tourism. Nevertheless, the demand for responsible tourism seems to be lacking, with green holidays being low down on the list for tourists throughout the holiday purchasing process (Sharpley, 2009). Sustainable tourism is often regarded as ecotourism and their objectives are viewed as parallel, both embracing host community sense and conservation of natural, built and heritage beauty and resources. However, ecotourism in fact is a type of nature-based niche tourism, which is simply a mode of sustainable tourism (Wearing and Neil, 2009). Eco-labels of products and services are growing in numbers and greenwashing amongst tourism sectors is gaining popularity, however their environmental credentials are hard to measure (Dahl, 2010). This trend is adopted by many tourism suppliers, who seem to be implementing sustainable practices, whereas none of them have changed in reality. A case study of the ecotourism (dragon tourism) in Indonesia showed that this type of tourism was viewed as a sustainable alternative to the mass tourism, favouring local communities. In fact, after a small-scale survey was conducted in the area, results showed that local communities are lacking employment, an d distributional inequalities exist, favouring external suppliers (Walpole and Goodwin, 2000). Robinson (2004) labels the greenwashing used as a method to cover up for unsustainable tourism practices as hypocrisy. It is also seen as a method to place guilt on tourists and to sell eco holidays, which in fact may not be that green (Robbins, 2008). In that sense, the triple bottom line (TBL) has been introduced to measure organisations performance in social, economic and environmental terms and it is key to sustainable development (Elkington, 1998). The most comprehensive framework to measure these sustainable indicators was set by the UNWTO (2004). However, it is very hard to measure TBL as again there is no consensus on a measurement framework and different measures need to be applied depending whether it is used on organisations or at destination level. Marshall and Toffel (2005) identified that sustainability can be placed on a continuum, where at one end is the micro sustainabilit y and on the other is the macro sustainability. During the past decades sustainable tourism practices tend to be small-scale projects on local level, whereas in order to achieve sustainable development through tourism, they should be happening at large scale, globally (Stoddard et al., 2012). Mullers (1994) statement that sustainable tourism is difficult to achieve is relevant today. It is true that conceptually sustainable tourism development is ideal; however it is hard to implement. Therefore, the main task for tourism organisations and governments is to identify and agree upon common rules and codes of conducted. Sustainable tourism development is not simply an economic process, as suggested by the modernisation theory; it is however multidimensional process and should lead to good change (Chambers, 1997). In order for organisations to adopt the good change the following ethical values should be applied towards sustainable tourism development: self-sufficiency; self-determination; empowerment; and improvement of living standards. Sustainable practices should be adopted by all tourism organisations because earth resources are finite, therefore resources should not be consumed at faster pace that they renew, maintaining biological diversity of the planet. Equity between communities should be sustained, involving local people in development processes, following their customs and cultures. All these should be done through the adoption of long-term strategic planning. Main points are that in order to develop sustainable tourism, key economic and environmental costs should be considered. Economic growth should be achieved in more environmentally and socially sound manners, instead of earlier practices. Issues regarding environment should be considered at government levels, however involving individual consumer. And finally, the needs of present generations should be met in a way that does not compromise on the ability of future generations to do so.

Michael Moores ‘Bowling for Columbine’ Essay -- Michael Moore, Bowlin

Michael Moore was born on April 23rd 1954. He’s An American film maker, author and a liberal political commentator. He has directed and produced four of the eight highest grossing documentaries of all time. In 2005 Time Magazine named Moore one of the world’s ‘Hundred most influential people’. The documentary ‘Bowling for Columbine’ explores the possible causes for the Columbine High School massacre. It has won the ‘Best Documentary feature’ at both the Academy and Independent Spirit Awards, together with the CÃ ©sar award for ‘best foreign films’. In this sequence we see American fighter jets dropping bombs on residential areas of a village in Kosovo. Then the American President, Bill Clinton, says they are ‘trying not to hurt innocent civilians’. Following this there’s a caption reading ‘one hour later’ with the President talking about the shooting at Columbine High School, now a transition occurs where the screen fades to a picture of the schools entrance, showing a plaque which reads ‘Columbine High School-Home of the Rebels. The video changes to a subjective point of view shot, showing someone walking into school while the audio is of a sad, acoustic guitar. As the person walks through the school with his camera he ironically stops and takes footage of a soldier with a gun in his hand. CCTV (close circuit television) footage is then shown of the children at the school scurrying around trying to protect themselves from the onslaught of ammunition and explosives. A shot of Eric Harris a nd Dylan Klebold firing rounds of ammunition and throwing grenades around the hall is followed, during this a telephone call to the emergency services from Eric’s father saying that his son was involved in the shooting is played over the top. We... ... also exposes the U.S government because when President Clinton states that ‘they are trying to minimise the civilian casualties’, he ‘forgets’ to say that the Americans targeted hospitals and primary schools. If I was an American I would feel disgraced and ashamed of my people. Michael Moore uses all the techniques of film making like location, lighting and body language to help the viewers identify the genre and context of the film. He produces a brilliant and enthralling documentary on the Columbine shooting. I think the sequence is quite thought provoking. Perhaps it’s just a subtle reminder for us to stop and think for a moment if we are heading in the right direction or should we turn a blind eye to whatever is happening around us? My opinion is that such violence, the use of guns and ammunition, should be totally condemned in any part of the world.

Essay --

The smell of thanksgiving dinner piques your interest long before you see it. Visions of roasted meats, potatoes dripping with gravy, butter soaked rolls and steaming pumpkin pies dance through your mind. However, when you run downstairs and observe the feast, you can hardly believe your eyes, plates overflow with foods you’ve never seen before: Yellowstone carrots, Royal Burgundy beans, Golden beets, and a Bourbon Red turkey. The color wheel cooked and set on your table sparking images of a completely different time, when the producer of our food was the farmer down the road; when our freshly prepared meals were packed with nutrients and the words affordable and healthy went hand-in-hand. In today’s American life, this vision of our food system is nowhere near our dinner plates. We were once confined to eating what was within sight and within season, but no longer do climates or distances constrain our menus. Our pantries are full year round -- all foods and all seasons. Plus, its cheap; so cheap that of each dollar we spend only nine cents will be on the life sustaining nutrients our bodies demand according to Annette Clauson in 2010 on behalf of the United State Department of Agriculture. However, two side effects of this system are becoming ever more obvious. First, we face a major food-related health care crisis and second, our farmers continue to experience economic insecurity. Fortunately, a forward-thinking group of people works to solve these problems by turning back the clock and taking a lesson from better times. They ask, â€Å"What if instead of being shipped from unknown locations, our food came from closer to home, from our friends and neighbors whose practices we know and whose livelihood we can support?† They seek t... ...he country which is documented by Martinez for the Department of Agriculture where he also discusses how community supported agriculture programs sustain nearly 1,500 farms. Chico has our very own farmers markets and they vary throughout the year of what day. They sell flowers, food, fresh crops, plus other locally produced items. The potential for these numbers to grow is enormous; especially if people want this food. With such powerful information streaming on a daily basis, think of what the future could hold: a food system where the agrarian heritage of our nation refocuses on a nutritionally sustainable, economically healthy future. Where consumers know the producers of their quality food and where agriculture is a financially robust enterprise. Making this vision a reality doesn’t require anything radical; we must simply try to buy local as often as we can.

Affirmative Action Essay -- Rights Equality Inequality Papers

Affirmative Action Since its implementation in the United States in 1965, affirmative action has been a heated topic of debate. Designed to address the issue of inequality in American society, affirmative action is a number of programs and policies designed to give women and racial minorities more opportunities in education and the job market. As a result, affirmative action has received opposition, mainly from blue collar white males who feel that it compromises their best interests. In this paper, we will attempt to evaluate the impact of affirmative action on all Americans and its effectiveness in addressing the issue of inequality. History: Affirmative action was first mentioned in executive order 10925 on March 6, 1961. On July 2, 1964 the Civil Rights act was signed by President Johnson to guarantee equal rights to all Americans. President Johnson introduced affirmative action on June 4, 1965. He gave a speech defining the concept of affirmative action as a way of countering the discrimination that had continued despite the passing of civil rights laws and constitutional guarantees. On September 24, 1965 executive order 11246 enforced affirmative action for the first time (Brunner). Affirmative action was met with both support and opposition. Conservatives saw it as opening doors of opportunity for minorities while shutting them for whites, calling it reverse racism. Because many conservative Americans prided themselves on hard work and making a fortune out of nothing, they resented what they thought of as blacks getting a free ride. They argued that Jews and Asians also underwent harsh forms of racism and discrimination but are largely successful now without the use of Government aid (Brunner). Supporter... ...center.org/DB/factsheet/historical-trendsII.htm {scholarly primary, print via internet; authoritative} â€Å"Housing and Household Economic Statistics.† U.S. Census Bureau. www.census.gov/hhes/income {scholarly primary, internet only; authoritative} â€Å"Race: Overview.† Public Agenda. 2004. http://www.publicagenda.org/issues/overview.cfm?issue_type=race {scholarly secondary, internet only; authoritative} â€Å"Race: Quick Takes.† Public Agenda. 2004. http://www.publicagenda.org/issues/angles.cfm?issue_type=race {scholarly secondary, internet only; authoritative} Ward, Dr. David. â€Å"Affirmative Action.† 2001. http://enlightenment.supersaturated.com/essays/text/david ward {scholarly primary, print via internet; authoritative} R. Yetman, Norman. â€Å"Race and Ethnicity†. Sociology McGraw-Hill. 1994 316-359 {scholarly primary, print, authoritative)

Film Review: Stella Dallas

Sophia Sullivan FLM2009-630: The Art of Film M. Brown Melodrama Stella Dallas (1937) Dir. King Vidor. Starring: Barbara Stanwyck, John Boles, Anne Shirley, Barbara O’Neil, Alan Hale. MGM (DVD) This film follows our protagonist, Stella (Barbara Stanwyck) through her journey of courtship, marriage to loss. Stella sneaks her way into meeting Stephen Dallas (John Boles) after finding out in a tabloid magazine article about his family fortune being loss and him ending his engagement to Helen (Barbara O’Neil) the socialite.Stella’s complete devotion to her daughter Laurel (Anne Shirley) and her reluctance to change who she is, keeps her from moving to New York with her newly promoted husband Stephen (John Boles). Living separate lives, not completely confessing to the fact that the couple was what would currently be called â€Å"legally separated† due to probable censors. The film’s thematic of maternal sacrifice and the loneliness, devotion of the film c ause this movie to become what is known in the film industry as a â€Å"Weepie†.The Mise-en-scene of the film is predominantly domestic and focused on the excesses of interiors and Stella’s outlandish fashions. The film cannot be categorized as realistic, even though it seems naturalistic at times. The storytelling of Stella’s constant journey to better her life and that of Laurel’s, is purely stylized. Stella’s persona sticks out like a sore thumb against the socialite circles, dressing in the eccentric fashions she deems as stylish, speaking too loud, not fitting into the lady-like deportment her husband demanded.This being the mother ship of all maternal melodramas, Stella sets a mold for the many to follow. The constant waves of swoony and dramatic music create an emotional musical blanket throughout the film. Setting the moods in the scenes from happy to sad with one wave of the conductor’s hand. The acting at times seemed unnatural and campy, like a modern day Soap Opera. The lives and differences of the social classes in this film was popular at the time. I guess being that a large percentage of the populace were currently lower to middle class Americans.The theater was the ultimate form of escapism to the masses. The melodrama was a peephole of sorts into the gorgeous and painfully dramatic lives of the wealthy. Stella ends up making the definitive maternal sacrifice at the end of the film. She turns her daughter against her to guarantee her daughter the future she herself wanted one time, forsaking her own happiness. To give up a child so that child could be happy is a dreadfully painful sacrifice to any loving mother.In the final scene of the film, Stella watching with the crowd outside the window of Stephen’s new home, as their daughter weds into a wealthy family. Laurel now is not associated with the brassy Stella and has been accepted into the social circle of the elite. She watches as Laurel weds, with tears rolling down her face, the rain soaking her. She then turns away and walks down the street triumphantly with a huge smile on her face. This feminine sacrifice completes her daughter’s road to happiness. The melodrama is known for its sudden shift in emotions.One moment Stella is yelling at her daughter for finding the dress she was making her as a surprise and ten seconds later she is hugging her and telling her how much she loves her. In my opinion this genre juxtaposes moments of utter happiness and bliss with the abrupt change to hysterics and tears far too quickly to not require a psych consult. I know this film is a classic and a classic to the melodrama genre, but I just don’t get it. I guess it was the social norm at the time to look upon women with esteem for giving everything up to guarantee the happiness of child, marriage and home.But then again she could have been happy enough with herself to not want to marry someone just to better herself. She would marry someone who loved her for who she was and where she came from. She could of raised her child with a strong sense of self that would have her become a role model and not an embarrassment. I speculate that was not the case when it came to creating a melodrama. Thank you King Vidor for creating the blueprint for all Lifetime Channel movies. Like sands through the hourglass†¦..

Health and Fitness Essay

For many years there has been a debate between which is better for weight control and all around health and fitness, Cardiorespiratory Exercise or Weight Training. Many people tend to focus only on one aspect of the physical wellness. For example women, like myself may focus more on cardiorespiratory and flexibility training more so than Weight training. This is out of fear of injury, or the muscles becoming too bulky. Women tend to want to burn more calories, therefore they focus on exercises’ such as aerobics, walking, swimming, and jogging. Research shows that working out with weights has health benefits beyond simply bulking up one’s muscles and strengthening bones. Studies are finding that more lean muscle mass may allow kidney dialysis patients to live longer, give older people better cognitive function, reduce depression, boost good cholesterol, lessen the swelling and discomfort of lymphedema after breast cancer and help lower the risk of diabetes. Although Weight training has its benefits for variety of reasons; it also has its downside. Weight training promotes short term stiffness of the blood vessels, which could promote High Blood Pressure over time and increase the load on the heart. This would not be good for someone who has a history of Hypertension. A variety of studies have shown that the best way to offset the cardiovascular stress caused by strength training is to combine cardiorespiratory endurance exercise such as a brisk walk, bicycling, or elliptical machine, immediately after a weight training exercise. Regular aerobic exercise causes your lungs to process more oxygen with less effort; your heart to pump more blood with fewer beats; and the blood supply directed to your muscles to increase. As a result, by performing cardiovascular exercises, you are increasing your body’s endurance and efficiency. Miriam Nelson of the American College of Sports Medicine states, â€Å"Ideally, you want a combination of moderate to vigorous aerobic exercise and moderate-intensity strength training† Bottom line to all of this research is both Resistance training and Cardiorespiratory exercise is good for the body, if done in the right order. http://www.the-invisible-gym.com/why-is-cardiovascular-training-and-resistance-training-important.html http://www.washingtonpost.com/wp-dyn/content/article/2007/04/20/AR2007042001772.html

Roger Mcgough Poem Analysi

Roger McGough was a well-known British poet who has written a lot of poems about inequality, life and unfairness between social classes. I have chosen to discuss and compare the following poem â€Å"The Commission†, â€Å"Nooligan† and â€Å"Streemin† of Roger McGough. The three poems I have chosen are mainly written in the area of inequality of this world and the unfairness of social class. In â€Å"The Commission† Roger McGough has written the contrast of the different social class and the difference between the wealthy and the poor. In the poem he wrote â€Å"In this poem there is a table.Groaning with food. There is also a child, Groaning for lack of food† this clearly stated out the different between the wealthy and the poor. In â€Å"Nooligan† he criticises the use of violence and bullying in school, he used the following lines â€Å"I’m a Nooligan don’t give a toss, in our class I’m the boss† to tell to the audience that everyone is born equal, no one should be hurt or to be treated differently to others. In the poem â€Å"Streemin† Roger McGough again criticises the inequality between the different social classes by using â€Å"But all these divishns aren’t reely fair†.Roger McGough’s poem is always very relaxed and smooth, never intense. Most of the time he seems like he is talking to himself or into his own deep thinking. In â€Å"The Commission† he used rhyme over the whole poem, with the relax tone, he presented his theme of the inequality like he was telling the audience about one of his dreams. However he used rhyming in the poem â€Å"Nooligan† to create a sense of humours, describing a bully in school, he presents his idea nicely to audience while giving them some fun.The poem â€Å"Streemin† isn’t written in formal language, slangs and short forms are used, this give the audience an idea that the person isn’t real ly educated, which presents his purpose for this poem perfectly. After reading Roger McGough’s poem, I have learned a lot about life and this world. His poem told me that everybody are born in to this world equally and that no one should be treated like slaves, no matter of this social class, skin colour, culture background or the wealth and poor.He presented this to the audience through his poem â€Å"The commission† in the first 4 lines of the first stanza. In the 2nd stanza Roger McGough have written that there was a photographer draws â€Å"a little Asian girl, Naked, wide-eyed, pleading† he points out the unfairness in this world very clear and sharp with just one sentence. After reading and a little thinking of the poem, I feel really tempered about the unfairness in this world and even a little sadness, I think this was also what the poet felt while he wrote down this poem.From his poem â€Å"Nooligan† it teaches me that everyone should deserve hap piness in this world, because to be born into this world and determined that they are going to die sooner or later was not a child’s choice, it was not their choice to be born in to a violence family, it was not their fault that the parents are devoiced. Therefore I think that everyone who was born into this world deserves to have their own happiness and no one should have the power to take it away from them. Roger McGough was writing about the bullies in school in this poem, they hurt people.The rhyme used in this poem have turned mood very humorous and he used the humorous to present to the audience about the bullies in his eyes. â€Å"Streemin† was one of the shortest poems Roger McGough has written. He described the feelings of the lower social class with just a few sentences. In the last stanza he written â€Å"But all these divishns arnt reely fair look at the cemetery no Streemin there† presents his idea of how the lower social class look at this world. T hey have not been educated, but this does not make them less of a person.They think it’s not fair that they have to be treated differently to all the other people who live in this world just because they don’t like reading and can hardly write. After reading Roger McGough’s poem I feel like I have learned a lot about this society, good side and bad side. I would strongly recommend Roger McGough’s to a young adult, or people who are about to walk into this society, because his poem taught me a lot of things and this might benefit people in a lot of ways. And personally I really like his poems, like the way he presents his ideas and like his idea about this society

Exercise 7 Respiratory System Mechanics

EXERCISE 7 Respiratory System Mechanics O B J E C T I V E S 1. To explain how the respiratory and circulatory systems work together to enable gas exchange among the lungs, blood, and body tissues 2. To define respiration, ventilation, alveoli, diaphragm, inspiration, expiration, and partial pressure 3. To explain the differences between tidal volume, inspiratory reserve volume, expiratory reserve volume, vital capacity, residual volume, total lung capacity, forced vital capacity, forced expiratory volume, and minute respiratory volume 4. To list various factors that affect respiration 5. To explain how surfactant works in the lungs to promote respiration 6. To explain what happens in pneumothorax 7. To explain how hyperventilation, rebreathing, and breathholding affect respiratory volumes T he physiological functions of respiration and circulation are essential to life. If problems develop in other physiological systems, we can still survive for some time without addressing them. But if a persistent problem develops within the respiratory or circulatory systems, death can ensue within minutes. The primary role of the respiratory system is to distribute oxygen to, and remove carbon dioxide from, the cells of the body. The respiratory system works hand in hand with the circulatory system to achieve this. The term respiration includes breathing—the movement of air in and out of the lungs, also known as ventilation—as well as the transport (via blood) of oxygen and carbon dioxide between the lungs and body tissues. The heart pumps deoxygenated blood to pulmonary capillaries, where gas exchange occurs between blood and alveoli (air sacs in the lungs), oxygenating the blood. The heart then pumps the oxygenated blood to body tissues, where oxygen is used for cell metabolism. At the same time, carbon dioxide (a waste product of metabolism) from body tissues diffuses into the blood. The deoxygenated blood then returns to the heart, completing the circuit. Ventilation is the result of muscle contraction. The diaphragm—a domeshaped muscle that divides the thoracic and abdominal cavities—contracts, making the thoracic cavity larger. This reduces the pressure within the thoracic cavity, allowing atmospheric gas to enter the lungs (a process called inspiration). When the diaphragm relaxes, the pressure within the thoracic cavity increases, forcing air out of the lungs (a process called expiration). Inspiration is considered an â€Å"active† process because muscle contraction requires the use of ATP, whereas expiration is usually considered a â€Å"passive† process. When a person is running, however, the external intercostal muscles contract and make the thoracic cavity even larger than with diaphragm contraction alone, and expiration is the result of the internal intercostal muscles contracting. In this case, both inspiration and expiration are considered â€Å"active† processes, since muscle contraction is needed for both. Intercostal muscle contraction works in conjunction with diaphragm muscle contraction. 87 88 Exercise 7 (a) Atmospheric pressure Parietal pleura Thoracic wall Visceral pleura Pleural cavity Transpulmonary pressure 760 mm Hg 756 mm Hg 4 mm Hg 756 760 Intrapleural pressure 756 mm Hg ( 4 mm Hg) Lung Diaphragm Intrapulmonary pressure 760 mm Hg (0 mm Hg) (b) F I G U R E 7 . 1 Respiratory volumes. a) Opening screen of the Respiratory Volumes experiment. (b) Intrapulmonary and intrapleural relationships Respiratory System Mechanics 89 Respiratory Volumes Ventilation is measured as the frequency of breathing multiplied by the volume of each breath, called the tidal volume. Ventilation is needed to maintain oxygen in arterial blood and carbon dioxide in venous blood at their normal levels—that is, at their normal partial pressures. [The term partial pressure refers to the proportion of pressure that a single gas exerts within a mixture. For example, in the atmosphere at sea level, the pressure is 760 mm Hg. Oxygen makes up about 20% of the total atmosphere and therefore has a partial pressure (PO2 ) of 760 mm Hg 20%, close to 160 mm Hg. ] Oxygen diffuses down its partial pressure gradient to flow from the alveoli of the lungs into the blood, where the oxygen attaches to hemoglobin (meanwhile, carbon dioxide diffuses from the blood to the alveoli). The oxygenated blood is then transported to body tissues, where oxygen again diffuses down its partial pressure gradient to leave the blood and enter the tissues. Carbon dioxide (produced by the metabolic reactions of the tissues) diffuses down its partial pressure gradient to flow from the tissues into the blood for transport back to the lungs. Once in the lungs, the carbon dioxide follows its partial pressure gradient to leave the blood and enter the air in the alveoli for export from the body. Normal tidal volume in humans is about 500 milliliters. If one were to breathe in a volume of air equal to the tidal volume and then continue to breathe in as much air as possible, that amount of air (above and beyond the tidal volume) would equal about 3100 milliliters. This amount of air is called the inspiratory reserve volume. If one were to breathe out as much air as possible beyond the normal tidal volume, that amount of air (above and beyond the tidal volume) would equal about 1200 milliliters. This amount of air is called the expiratory reserve volume. Tidal volume, inspiratory reserve volume, and expiratory reserve volume together constitute the vital capacity, about 4800 milliliters. It is important to note that the histological structure of the respiratory tree (where air is found in the lungs) will not allow all air to be breathed out of the lungs. The air remaining in the lungs after a complete exhalation is called the residual volume, normally about 1200 milliliters. Therefore, the total lung capacity (the vital capacity volume plus the residual volume) is approximately 6000 milliliters. All of these volumes (except residual volume) can be easily measured using a spirometer. Basically, a spirometer is composed of an inverted bell in a water tank. A breathing tube is connected to the bell’s interior. On the exterior of the inverted bell is attached a pen device that records respiratory volumes on paper. When one exhales into the breathing tube, the bell goes up and down with exhalation. Everything is calibrated so that respiratory volumes can be read directly from the paper record. The paper moves at a pre-set speed past the recording pen so that volumes per unit time can be easily calculated. In addition to measuring the respiratory volumes introduced so far, the spirometer can also be used to perform pulmonary function tests. One such test is the forced vital capacity (FVC), or the amount of air that can be expelled completely and as rapidly as possible after taking in the deepest possible breath. Another test is the forced expiratory volume (FEV1), which is the percentage of vital capacity that is exhaled during a 1-sec period of the FVC test. This value is generally 75% to 85% of the vital capacity. In the following experiments you will be simulating spirometry and measuring each of these respiratory volumes using a pair of mechanical lungs. Follow the instructions in the Getting Started section at the front of this lab manual to start up PhysioEx. From the drop-down menu, select Exercise 7: Respiratory System Mechanics and click GO. Before you perform the activities watch the Water-Filled Spirometer video to see the experiment performed with a human subject. Then click Respiratory Volumes. You will see the opening screen for the â€Å"Respiratory Volumes† experiment (Figure 7. 1). At the left is a large vessel (simulating the thoracic cavity) containing an air flow tube. This tube looks like an upside-down â€Å"Y. † At the ends of the â€Å"Y† are two spherical containers, simulating the lungs, into which air will flow. On top of the vessel are controls for adjusting the radius of the tube feeding the â€Å"lungs. This tube simulates the trachea and other air passageways into the lungs. Beneath the â€Å"lungs† is a black platform simulating the diaphragm. The â€Å"diaphragm† will move down, simulating contraction and increasing the volume of the â€Å"thoracic cavity† to bring air into the â€Å"lungs†; it will then move up, simulating relaxation and decreasin g the volume of the â€Å"thoracic cavity† to expel air out. At the bottom of the vessel are three buttons: a Start button, an ERV (expiratory reserve volume) button, and an FVC (forced vital capacity) button. Clicking Start will start the simulated lungs breathing at normal tidal volume; clicking ERV will simulate forced exhalation utilizing the contraction of the internal intercostal muscles and abdominal wall muscles; and clicking FVC will cause the lungs to expel the most air possible after taking the deepest possible inhalation. At the top right is an oscilloscope monitor, which will graphically display the respiratory volumes. Note that the Yaxis displays liters instead of milliliters. The X-axis displays elapsed time, with the length of the full monitor displaying 60 seconds. Below the monitor is a series of data displays. A data recording box runs along the bottom length of the screen. Clicking Record Data after an experimental run will record your data for that run on the screen. A C T I V I T Y 1 Trial Run Let’s conduct a trial run to get familiarized with the equipment. 1. Click the Start button (notice that it immediately turns into a Stop button). Watch the trace on the oscilloscope monitor, which currently displays normal tidal volume. Watch the simulated diaphragm rise and fall, and notice the â€Å"lungs† growing larger during inhalation and smaller during exhalation. The Flow display on top of the vessel tells you the amount of air (in liters) being moved in and out of the lungs with each breath. 2. When the trace reaches the right side of the oscilloscope monitor, click the Stop button and then click Record Data. Your data will appear in the data recording box along the bottom of the screen. This line of data tells you a wealth of information about respiratory mechanics. Reading the data from left to right, the first data field should be that of the Radius of the air flow tube (5. 00 mm). The next data field, Flow, displays the total flow volume for this experimental run. T. V. stands for â€Å"Tidal Volume†; E. R. V. for â€Å"Expiratory 90 Exercise 7 Reserve Volume†; I. R. V. for â€Å"Inspiratory Reserve Volume†; R. V. for â€Å"Residual Volume†; V. C. for â€Å"Vital Capacity†; FEV1 for â€Å"Forced Expiratory Volume†; T. L. C. for â€Å"Total Lung Capacity†; and finally, Pump Rate for the number of breaths per minute. 3. You may print your data at any time by clicking Tools at the top of the screen and then Print Data. You may also print the trace on the oscilloscope monitor by clicking Tools and then Print Graph. 4. Highlight the line of data you just recorded by clicking it and then click Delete Line. . Click Clear Tracings at the bottom right of the oscilloscope monitor. You are now ready to begin the first experiment.  ¦ A C T I V I T Y 2 6. Click Clear Tracings before proceeding to the next activity. Do not delete your recorded data—you will need it for the next activity.  ¦ A C T I V I T Y 3 Effect of Restricted Air Flow on Respiratory Volumes 1. Adjust the radius of the air flow tube to 4. 00 mm by clicking the ( ) button next to the radius display. Repeat steps 2–5 from the previous activity, making sure to click Record Data. How does this set of data compare to the data you recorded for Activity 2? The breathing isn't as strong ________________________________________________ the flow and tidal volume have decreased ________________________________________________ Is the respiratory system functioning better or worse than it did in the previous activity? Explain why. functioning worse, it isn't moving as much air or expanding ________________________________________________ the lungs as far because of the decreased space for intake ________________________________________________ and output of air 2. Click Clear Tracings. 3. Reduce the radius of the air flow tube by another 0. 0 mm to 3. 50 mm. 4. Repeat steps 2–6 from Activity 2. 5. Reduce the radius of the air flow tube by another 0. 50 mm to 3. 00 mm. 6. Repeat steps 2–6 from Activity 2. What was the effect of reducing the radius of the air flow tube on respiratory volumes? furthur decrease of flow and tidal volume ________________________________________________ ________________________________________________ What does the air flow tube simulate in the human body? trachea ________________________________________________ ________________________________________________ Measuring Normal Respiratory Volumes 1. Make sure that the radius of the air flow tube is at 5. 00 mm. To adjust the radius, click the ( ) or ( ) buttons next to the radius display. 2. Click the Start button. Watch the oscilloscope monitor. When the trace reaches the 10-second mark on the monitor, click the ERV button to obtain the expiratory reserve volume. 3. When the trace reaches the 30-second mark on the monitor, click the FVC to obtain the forced vital capacity. 4. Once the trace reaches the end of the screen, click the Stop button, then click Record Data. . Remember, you may print your trace or your recorded data by clicking Tools at the top of the screen and selecting either Print Graph or Print Data. From your recorded data, you can calculate the minute respiratory volume: the amount of air that passes in and out of the lungs in 1 minute. The formula for calculating minute respiratory volume is: Minute respiratory volume tidal volume bpm (breaths per minute) Calculate and en ter the minute respiratory volume: _7,500________ Judging from the trace you generated, inspiration took place over how many seconds? __2 seconds_____________ Expiration took place over how many seconds? What could be some possible causes of reduction in air flow to the lungs? obstruction, inflammation from illness or allergic ________________________________________________ reaction ________________________________________________ ________________________________________________ 7. Click Tools > Print Data to print your data. _____2 seconds____________ Does the duration of inspiration or expiration vary during yes ERV or FVC? _____ Respiratory System Mechanics 91 FIGURE 7. 2 Opening screen of the Factors Affecting Respiration experiment. Express your FEV1 data as a percentage of vital capacity by filling out the following chart. (That is, take the FEV1 value and divide it into the vital capacity value for each line of data. ) Factors Affecting Respiration Many factors affect respiration. Compliance, or the ability of the chest wall or lung to distend, is one. If the chest wall or lungs cannot distend, respiratory ability will be compromised. Surfactant, a lipid material secreted into the alveolar fluid, is another. Surfactant acts to decrease the surface tension of water in the fluid that lines the walls of the alveoli. Without surfactant, the surface tension of water would cause alveoli to collapse after each breath. A third factor affecting respiration is any injury to the thoracic wall that results in the wall being punctured. Such a puncture would effectively raise the intrathoracic pressure to that of atmospheric pressure, preventing diaphragm contraction from decreasing intrathoracic pressure and, consequently, preventing air from being drawn into the lungs. Recall that airflow is achieved by the generation of a pressure difference between atmospheric pressure on the outside of the thoracic cavity and intrathoracic pressure on the inside. ) We will be investigating the effect of surfactant in the next activity. Click Experiment at the top of the screen and then select Factors Affecting Respiration. The opening screen will look like Figure 7. 2. Notice the changes to the FEV1 as % of Vital Capacity Radius FEV1 Vital Capacity FEV1 (%) 5. 00 4. 00 3. 50 3. 00 3541 1422 822 436 4791 1962 1150 621 1. 35% 1. 37% 1. 39% 1. 42%  ¦ 92 Exercise 7 quipment above the air flow tube. Clicking the Surfactant button will add a pre-set amount of surfactant to the â€Å"lungs. † Clicking Flush will clear the lungs of surfactant. Also notice that valves have been added to the sides of each simulated lung. Opening the valves will allow atmospheric pressure into the vessel (the â€Å"thoracic cavity†). Finally, notice the changes to the display windows below the oscilloscope screen. Flow Left and Pressure Left refer to the flow of air and pressure in the left â€Å"lung†; Flow Right and Pressure Right refer to the flow of air and pressure in the right â€Å"lung. Total Flow is the sum of Flow Left and Flow Right. A C T I V I T Y 4 3. Click Flush to remove the surfactant from the previous activity. 4. Be sure that the air flow radius is set at 5. 00 mm, and that P ump Rate is set at 15 strokes/minute. 5. Click on Start and allow the trace to sweep the length of the oscilloscope monitor. Notice the pressure displays, and how they alternate between positive and negative values. 6. Click Record Data. Again, this is your baseline data. 7. Now click the valve for the left lung, which currently reads â€Å"Valve closed. † 8. . Click Start and allow the trace to sweep the length of the Click Record Data. oscilloscope monitor. Effect of Surfactant on Respiratory Volumes 1. The data recording box at the bottom of the screen should be clear of data. If not, click Clear Table. 2. The radius of the air flow tube should be set at 5. 00 mm, and the Pump Rate should be set at 15 strokes/minute. 3. Click Start and allow the trace to sweep across the full length of the oscilloscope monitor. Then click Record Data. This will serve as the baseline, or control, for your experimental runs. You may wish to click Tools and then Print Graph for a printout of your trace. 4. Click Surfactant twice to add surfactant to the system. Repeat step 3. When surfactant is added, what happens to the tidal volume? It increases the amount of air being inhaled ________________________________________________ As a result of the tidal volume change, what happens to the flow into each lung and total air flow? ________________________________________________ they all increase Why does this happen? urfactant decreases teh surface tension of water in the ________________________________________________ fluid that lines the walls of the alveoli ________________________________________________ Remember, you may click Tools and then either Print Data or Print Graphs to print your results.  ¦ A C T I V I T Y 5 What happened to the left lung when you clicked on the valve button? Why? The lung deflated due to the change in the intrapleural ________________________________________________ pressure ________________________________________________ ________________________________________________ What has happened to the â€Å"Total Flow† rate? t reduced ________________________________________________ by half 0 What is the pressure in the left lung? ___________________ no Has the pressure in the right lung been affected? _________ If there was nothing separating the left lung from the right lung, what would have happened when you opened the valve for the left lung? Why? Both lungs would have collapsed due to pressure ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ Now click the valve for the left lung again, closing it. What happens? Why? nothing , there is excess air remaining in the lung ________________________________________________ ________________________________________________ Click Reset (next to the Flush button at the top of the air flow tube). What happened? the lung reinflated ________________________________________________ Describe the relationship required between intrathoracic pressure and atmospheric pressure in order to draw air into the lungs. intrathroacic pressure must be greater or lower than ________________________________________________ atmospheric pressure to draw air in and out of the lungs _______________________________________________ Effect of Thoracic Cavity Puncture Recall that if the wall of the thoracic cavity is punctured, the intrathoracic pressure will equalize with atmospheric pressure so that the lung cannot be inflated. This condition is known as pneumothorax, which we will investigate in this next activity. 1. Do not delete your data from the previous act ivity. 2. If there are any tracings on the oscilloscope monitor, click Clear Tracings. Respiratory System Mechanics 93 FIGURE 7. 3 Opening screen of the Variations in Breathing experiment. Design your own experiment for testing the effect of opening the valve of the right lung. Was there any difference from the effect of opening the valve of the left lung? no ________________________________________________ Remember, you may click Tools and then either Print Data or Print Graphs to print your results.  ¦ Variations in Breathing Normally, alveolar ventilation keeps pace with the needs of body tissues. The adequacy of alveolar ventilation is measured in terms of the partial pressure of carbon dioxide (PCO2). Carbon dioxide is the major component for regulating breathing rate. Ventilation (the frequency of breathing multiplied by the tidal volume) maintains the normal partial pressures of oxygen and carbon dioxide both in the lungs and blood. Perfusion, the pulmonary blood flow, is matched to ventilation. The breathing patterns of an individual are tightly regulated by the breathing centers of the brain so that the respiratory and circulatory systems can work together effectively. In the next activity you will examine the effects of rapid breathing, rebreathing, and breathholding on the levels of carbon dioxide in the blood. Rapid breathing increases breathing rate and alveolar ventilation becomes excessive for tissue needs. It results in a decrease in the ratio of carbon dioxide production to alveolar ventilation. Basically, alveolar ventilation becomes too great for the amount of carbon dioxide being produced. In rebreathing, air is taken in that was just expired, so the PCO2 (the partial pressure of carbon dioxide) in the alveolus (and subsequently in the blood) is elevated. In breathholding, there is no ventilation and no gas exchange between the alveolus and the blood. Click Experiment at the top of the screen and select Variations in Breathing. You will see the next screen, shown in Figure 7. 3. This screen is very similar to the ones you have been working on. Notice the buttons for Rapid Breathing, Rebreathing, Breath Holding, and Normal Breathing—clicking each of these buttons will induce the given pattern of breathing. Also note the displays for PCO2, Maximum PCO2, Minimum PCO2, and Pump Rate. 94 Exercise 7 A C T I V I T Y 6 How does the rebreathing trace compare to your baseline trace? (Look carefully—differences may be subtle. ) ________________________________________________ Why? _______________________________________________ ________________________________________________ Click Clear Tracings to clear the oscilloscope monitor.  ¦ A C T I V I T Y 8 Rapid Breathing 1. The oscilloscope monitor and the data recording box should both be empty and clear. If not, click Clear Tracings or Clear Table. 2. The air flow tube radius s hould be set to 5. 00. If not, click the ( ) or ( ) buttons next to the radius display to adjust it. 3. Click Start and conduct a baseline run. Remember to click Record Data at the end of the run. Leave the baseline trace on the oscilloscope monitor. 4. Click Start again, but this time click the Rapid Breathing button when the trace reaches the 10-second mark on the oscilloscope monitor. Observe the PCO2 levels in the display windows. 5. Allow the trace to finish, then click Record Data. What happens to the PCO2 level during rapid breathing? it decreased ________________________________________________ Why? co2 was removed more than during normal breathing ________________________________________________ ________________________________________________ Remember, you may click Tools and then either Print Data or Print Graphs to print your results. Click Clear Tracings before continuing to the next activity.  ¦ A C T I V I T Y 7 Breath Holding 1. Click on Start and conduct a baseline run. Remember to click Record Data at the end of the run. Leave the baseline trace on the oscilloscope monitor. 2. Click Start again, but this time click the Breath Holding button when the trace reaches the 10-second mark on the oscilloscope monitor. Observe the PCO2 levels in the display windows. 3. At the 20-second mark, click Normal Breathing and let the trace finish. 4. Click Record Data. What happens to the PCO2 level during breath holding? t rose ________________________________________________ Why? co2 exchange could not take place ________________________________________________ ________________________________________________ Rebreathing Repeat Activity 6, except this time click the Rebreathing button instead of the Rapid Breathing button. What happens to the PCO2 level during rebreathing? it increase ____________________________________ ____________ ________________________________________________ Why? there was more co2 in the inhaled air ________________________________________________ ________________________________________________ What change was seen when you returned to â€Å"Normal Breathing†? the rate and depth of breathing increased ________________________________________________ ______________________________________________  ¦ Remember, you may print your data or graphs by clicking Tools at the top of the screen and then selecting either Print Data or Print Graph.  ¦ A C T I V I T Y 9 Comparative Spirometry In Activity 1, normal respiratory volumes and capacities are measured. In this activity, you will explore what happens to these values when pathophysiology develops or during episodes of aerobic exercise. Using a water-filled spirometer and knowledge of respiratory mechanics, changes to these values in each condition can be predicted, documented, and explained. Did the total flow change? just a little ________________________________________________ Why? increase pump rate ________________________________________________ ________________________________________________ Respiratory System Mechanics 95 FIGURE 7. 4 Opening screen of the Comparative Spirometry experiment. Normal Breathing 1. Click the Experiment menu, and then click Comparative Spirometry. The opening screen will appear in a few seconds (see Figure 7. 4). 2. For the patient’s type of breathing, select the Normal option from the drop-down menu in the Patient Type box. These values will serve as a basis of comparison in the diseased conditions. 3. Select the patient’s breathing pattern as Unforced Breathing from the Breathing Pattern Option box. 4. After these selections are made, click the Start button and watch as the drum starts turning and the spirogram develops on the paper rolling off the drum across the screen, left to right. 5. When half the screen is filled with unforced tidal volumes and the trace has paused, select the Forced Vital Capacity button in the Breathing Pattern Options box. . Click the Start button and trace will continue with the FVC maneuver. The trace ends as the paper rolls to the right edge of the screen. 7. Now click on the individual measure buttons that appear in the data table above each data column to measure the lung volume and lung capacity data. Note that when a measure button is selected, t wo things happen simultaneously: (1) a bracket appears on the spirogram to indicate where that measurement originates on the spirogram and (2) the value in milliliters appears in the data table. Also note that when the FEV1 measure button is selected, the final column labeled FEV1/FVC will be automatically calculated and appear in the data table. The calculation is (FEV1/FVC) 100%, and the result will appear as a percentage in the data table. What do you think is the clinical importance of the FVC and FEV1 values? ________________________________________________ Why do you think the ratio of these two values is important to the clinician when diagnosing respiratory diseases? _______ demonstrates how the lungs are functioning ________________________________________________ FEV1 /FVC 100% 80% ______________________ 96 Exercise 7 Emphysema Breathing In a person with emphysema, there is a significant loss of intrinsic elastic recoil in the lung tissue. This loss of elastic recoil occurs as the disease destroys the walls of the alveoli. Airway resistance is also increased as the lung tissue in general becomes more flimsy and exerts less mechanical tethering on the surrounding airways. Thus the lung becomes overly compliant and expands easily. Conversely, a great effort is required to exhale as the lungs can no longer passively recoil and deflate. A noticeable and exhausting muscular effort is required for each exhalation. Thus a person with emphysema exhales slowly. . Using this information, predict what lung values will change in the spirogram when the patient with emphysema breathing is selected. Assume that significant disease has developed, and thus a loss of elastic recoil has occurred in this patient’s lungs. 2. Select Emphysema from the drop-down menu in the Patient Type box. 3. Select the patient ’s breathing pattern as Unforced Breathing from the Breathing Pattern box. 4. After these selections are made and the existing spirogram screen clears, click the Start button and watch as the drum starts turning and a new spirogram develops on the paper rolling off the drum. . Repeat steps 5–7 of the Normal Breathing section in this activity. 6. Now consider the accuracy of your predictions (what changed versus what you expected to change). Compared to the values for normal breathing: reduced Is the FVC reduced or increased? ______________________ reduced Is the FEV1 reduced or increased? _____________________ fev1 Which of these two changed more? ____________________ Explain the physiological reasons for the lung volumes and capacities that changed in the spirogram for this condition. _______________________________________________ ________________________________________________ ________________________________________________ 1. Using this information, predict what lung values will change in the spirogram when the patient who is having an acute asthma attack is selected. Assume that significantly decreased airway radius and increased airway resistance have developed in this patient’s lungs. 2. Select Asthmatic from the drop-down menu in the Patient Type box. 3. Select the patient’s breathing pattern as Unforced Breathing from the Breathing Pattern box. . After these selections are made and the existing spirogram screen clears, click the Start button and watch as the drum starts turning and a new spirogram develops as the paper rolls off the drum. 5. Repeat steps 5–7 of the Normal Breathing section in this activity. 6. Now consider the accuracy of your predictions (what changed versus what you expected to change). Compared to the values for normal breathing: reduced Is the FVC reduced or increased? _____________________ reduced Is the FEV1 reduced or increased? _____________________ fev1 Which of these two changed more? ___ ________________ Explain the physiological reasons for the lung volumes and capacities that changed in the spirogram for this condition. ________________________________________________ ________________________________________________ How is this condition similar to having emphysema? How is the fvc is less reduce than emphysema and it different? ______________________________________ the fev1 is more reduced, the fcv/fev1 % is also reduced ________________________________________________ Emphysema and asthma are called obstructive lung diseases as they limit expiratory flow and volume. How would a spirogram look for someone with a restrictive lung disease, such as pulmonary fibrosis? decreased fev1/fev ________________________________________________ What volumes and capacities would change in this case, and would these values be increased or decreased? normal or above normal volume ________________________________________________ ________________________________________________ In an acute asthma attack, the compliance of the lung is decreased, not increased as it was for emphysema, and air flows freely through the bronchioles. Therefore, will the FEV1/ FVC percentage be less than normal, equal to normal, or higher higher than normal? ______________________________________ Acute Asthma Attack Breathing During an acute asthma attack, bronchiole smooth muscle will spasm and thus the airways become constricted (that is, they have a reduced diameter). They also become clogged with thick mucous secretions. These two facts lead to significantly increased airway resistance. Underlying these symptoms is an airway inflammatory response brought on by triggers such as allergens (e. g. , dust and pollen), extreme temperature changes, and even exercise. Similar to emphysema, the airways collapse and pinch closed before a forced expiration is completed. Thus the volumes and peak flow rates are significantly reduced during an asthma attack. However, the elastic recoil is not diminished in an acute asthma attack. Respiratory System Mechanics 97 Acute Asthma Attack Breathing with Inhaler Medication Applied When an acute asthma attack occurs, many people seek relief from the symptoms by using an inhaler. This device atomizes the medication and allows for direct application onto the afflicted airways. Usually the medication includes a smooth muscle relaxant (e. . , a beta-2 agonist or an acetylcholine antagonist) that relieves the bronchospasms and induces bronchiole dilation. The medication may also contain an antiinflammatory agent such as a corticosteroid that suppresses the inflammatory response. Airway resistance is reduced by the use of the inhaler. 1. Using this information, predict what lung values will change in the spirogram whe n the patient who is having an acute asthma attack applies the inhaler medication. By how much will the values change (will they return to normal)? 2. Select Plus Inhaler from the drop-down menu in the Patient Type box. 3. Select the patient’s breathing pattern as Unforced Breathing from the Breathing Pattern box. 4. After these selections are made and the existing spirogram screen clears, click the Start button and watch as the drum starts turning and a new spirogram develops as the paper rolls off the drum. 5. Repeat steps 5–7 of the Normal Breathing section. 6. Now consider the accuracy of your predictions (what changed versus what you expected to change). Compared to the values for the patient experiencing asthma symptoms: Has the FVC reduced or increased? Is it â€Å"normal†? ________ no no Has the FEV1 reduced or increased? Is it â€Å"normal†? _______ fev1 Which of these two changed more? ____________________ Explain the physiological reasons for the lung volumes and capacities that changed in the spirogram with the application of the medication. _________________________________ ________________________________________________ How much of an increase in FEV1 do you think is required for it to be considered significantly improved by the not sure medication? _______________________________________ when the feve1 is closer to normal? ________________________________________________ a. In moderate aerobic exercise, which do you predict will rv change more, the ERV or the IRV? _____________________ b. Do you predict that the respiratory rate will change yes significantly in moderate exercise? ____________________ c. Comparing heavy exercise to moderate exercise, what values do you predict will change when the body’s significantly increased metabolic demands are being met by the not sure respi ratory system? _________________________________ ________________________________________________ d. During heavy exercise, what will happen to the lung volumes and capacities that have been considered thus far? hey will increase ________________________________________________ e. yes Will the respiratory rate change? If so, how? _________ 1. Select Moderate Exercise from the drop-down menu in the Patient Type box. The existing spirogram clears. 2. Click the Start button and watch as the drum starts turning and a new spirogram develops. Half of the screen will fill with breathing volumes and capacities for moderate exercise. 3. When the trace pauses, click on the individual measure buttons that appear in the data table above each data column to measure the lung volume and lung capacity data. . Select Heavy Exercise from the drop-down menu in the Patient Type box. 5. Click the Start button and the trace will continue with the breathing pattern for heavy exercise. The trace ends as th e paper rolls to the right-hand edge of the screen. 6. Now click on the individual measure buttons that appear in the data table above each data column to measure the lung volume and lung capacity data. 7. Now consider the accuracy of your predictions (what changed versus what you expected to change). Which volumes changed the most and when? ___________ Compare the respiratory rate during moderate exercise with that seen during heavy exercise. __________________  ¦ Breathing During Exercise During moderate aerobic exercise, the human body has an increased metabolic demand, which is met in part by changes in respiration. During heavy exercise, further changes in respiration are required to meet the extreme metabolic demands of the body. Histology Review Supplement For a review of respiratory tissue, go to Exercise H: Histology Atlas & Review on the PhysioEx website to print out the Respiratory Tissue Review worksheet.