The Effect of Caffeine on Water Re-absorption in Kidney Lab Report

The Effect of Caffeine on Water Re-absorption in Kidney - Lab Report Example "ADH acts on the kidneys, concentrating the urine by promoting the re-absorption of water from the cortical collecting duct. Peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine functions in living animals. ..." (Anti diuretic hormone, 8 October 2008). The activation process of ADH is done by water receptors and these water receptors are located in extracellular fluid as well as intracellular fluid. It is very important to maintain water homeostasis and this is done by controlling two things namely, the osomolality and the intravascular blood volume. In the body of a human being water is lost by various activities such as breathing, which contributes the maximum in loss of water in a human body other activities include sweating, urination etc. "While several of these processes occur autonomic in healthy individuals, body water homeostasis is tightly controlled by regulating both water intake (drinking) and urinary water excretion. Changes in intravascular blood volume are sensed by vascular volume- and baroreceptors, which regulate the release of the anti diuretic hormone arginine vasopressin (AVP)." (Physiology, 8 October 2008) Caffeine is a diuretic; a diuretic is a drug which elevat... Re-absorption of water increases blood volume and concentrates the urine." (ADH, 8 October 2008). As discussed earlier in the paper that hypothalamus maintains a balance in the body and this is exactly where hypothalamus comes into effect, when hypothalamus detects a decrease in water level in blood, ADH is secreted, and the same is secreted by the posterior pituitary. ADH mainly targets the kidneys because the ultimate role of kidneys is to make sure that there is a good balance of the fluids in the body. The main function of ADH is to concentrate the urine and make sure that there is less of amount of water loss which is taking place in the body, it reduces the urine volume and prevents water loss from the body. Caffeine is responsible for reducing the vasopressin secretion, "Vasopressin is secreted from the posterior pituitary gland in response to reductions in plasma volume and in response to increases in the plasma osomolality" (Vasopressin, 8 October 2008). When caffeine is in took, it results in the reduction of vasopressin secretion, which ultimately means that the water re absorption gets reduced in the body and the output of urine becomes very frequent. The same can be understood with the help of an example, if we consume more coffee which has high levels of caffeine in it, we tend to become restless and the anxiety level in our body tend s to rise to an alarmingly high level, all this happens because of the presence of caffeine in coffee, the ultimate result of consuming more coffee will be dehydration because of the levels of caffeine present in the same. Caffeine causes the body to lose excessive amount of water and if coffee is consumed excessively, dehydration becomes inevitable. It is very easy to

Networking Essay Example | Topics and Well Written Essays - 500 words

Networking - Essay Example Each centre must have knowledgeable personnel to network file transfers and real time-links. At the same time, they must be competent enough to troubleshoot in case of network failure during training proper. The staffs must be headed by the network administrator to ensure "smooth flow" of information in the system. (Midkiff, 2004) As for gears, an 802.11g router (devices needed to connect various computer networks) is recommended than the 802.11b type since it supports faster peer-to-peer computer networking. (Wikipedia b, 2006) Since the company will be handling real-time video streams, it is necessary to invest in fast routers. Switches are also recommended than hubs in the setup that Wannabee Training Group wants to employ. No bandwidth sharing among various communication lines will happen if switches are to be used in the feedback feature between trainers and trainees. The switcher allows direct communication between two people privately, and will not use the traffic of the whole network. (Mitchell, 2006) The merged company must also adopt a uniform set of protocol and application to allow file sharing and video streaming (Wikipedia a, 2006). The application allows file sharing among users in the network, while the protocols provide the language by which the computers in the network will communicate. (Midkiff, 2004) On the two types of network designs, the peer

Marijuana and Prostitution Coursework Example | Topics and Well Written Essays - 750 words

Marijuana and Prostitution - Coursework Example The process of using one’s body to eaer money has been done in the olden ages and the pre historic times since the advent of the man into the earth. As of now, prostitution is not legalized in many jurisdictions all over the world. Countries such as the Netherlands have been able to legalize prostitution due to their progressive ideas and the fact that it is a huge way of making money through taxing this profession. In the following paragraphs I will explain whether prostitution is like any other crime, and if not then why do we need to legalize the oldest profession in the world. Question: 1 Whether Prostitution is like any other crime in the world? Prostitution is the art of providing the pleasure of sex on a continued basis for a long time. It has often been remarked that prostitution is like any other crime, but when one has a closer look at things and analyses them from a different perspective, one arrives at a conclusion that prostitution is not like any other crime. To commit a crime, there are two essential components, which have to be fulfilled by the person committing the crime. The first is the fact that there should be Mens Rea, and the second is the fact that there should be Actus Resus. Mens Rea is the guilty mind, while actus reus is the act committed by the guilty mind. A guilty mind under the definition of criminal law would constitute a mind which has negativism imbibed in it along with having a wrong intention of doing things in his/her favour. Prostitution is not connected with the guilty mind at all, if it was then having sex in the bedroom would also constitute to having a guilty mind and would have therefore been labeled as a crime. The imperative understanding which needs to be made here is that prostitution is nothing but providing the services of sex, and nothing else. We avail the services of law, other pleasure seeking services, then under the same perspective and the same context we also seek the services of Sex, and therefor e nothing wrong should be perceived in that context. Prostitution should be legalized for two significant reasons. The first one is the fact that there is no inclusion of any sort of guilty mind in the process of availing these services. The primary reason for availing this service is for pleasure seeking purpose and not from a criminal intention. The second reason is to have a check on the spread of STDs, especially AIDS. If prostitution is legalized all over the world, especially in countries such as India and South Africa, then it would help dramatically in having a check on AIDS along with the process of the controlling the same. Question 2: Whether Marijuana should be legalized? Yes, Marijuana should be legalized. In the United States, Marijuana has already been legalized in Colorado and Washington. This is just the beginning. The primary reason behind the legalization is again the same as prostitution. There is no criminal intent or any element criminality in the use and distr ibution of the drug. There have been many theories as to why marijuana was banned in the first place, but it must be understood and examined by the scholars that marijuana was the first drug of its kind, which provided pleasure to the human mind and brought him relaxation. The use of Marijuana for personal consumption has to be legalized in more places in the USA. The process can be initiated by having decriminalization legislation in place, and then once the response is understood and the feedback is received, then the process of legalization can be initiated. All this will happen in due course of time, and therefore although we need to keep moving slowly, we need to make sure that we move in the right direction. The benefits of legalization of Marijuana will be in a huge number. First of all, it will add as a source

Why do some protest groups use violence in the context of collective Essay - 1

Why do some protest groups use violence in the context of collective action - Essay Example Social change may render certain social groups to flourish or become powerful, and politically relevant; nevertheless, the availability of political opportunities does not automatically and immediately yield to heightened protest (Tarrow 1998, p.16). Collective action mainly focuses wholly on the behaviour and/or the authenticity of certain individuals. Collective identity draws from the recognition and the establishment of connectedness, which heralds a sense of common purpose and commitment to a certain cause. Social protests performances mainly emerge from marginalized peoples and oppositional struggles, whereby individuals utilize protests to counter hegemonic strategic via which underrepresented groups challenge the dominant social order and source of change. The representational apparatus provided by social protests serves to reinforce, re-articulate, and re-imagine the objectives of both social and political resistance (Oliver 1993, p.271). Traditional explanations to why indi viduals engage in political violence emphasize that deprivation, characteristically in the form of economic inequality generates grievances and discontent that trigger rebellion and social revolution (McCarthy and Zald 1977, p.1212). The paper explores why some protest groups utilize violence within the context of collective action. Background The contentious politics that were prominent in the 1960s and early 1970s heralded fresh energy to a subject that, for an extended period, has dominated scholarly and political legitimacy. In the 1970s, two prominent paradigms emerged from the welter of studies triggered by the disorderly politics of the 1960s, namely: the resource mobilization (RM) approach to social movement organizations within the US and the new social movement (NSM) approach within Western Europe (Thompson 1971, p.76). Historically, breakdown theory was the dominant theory that guided sociological study of collective action; nevertheless, this theory as deemed to be incre asingly incapable of accounting for the contemporaneous events (Useem 1998, p.215; Aminzade et al. 2001, p.12). Resource mobilization theory replaced breakdown theory as the dominant paradigm. Both resource mobilization and breakdown theories explain diverse forms of phenomena, and both are pertinent in helping account for the full range of forms of collective action (Goodwin and Jasper 2009, p.10). Use of Violence in the Context of Collective Action Collective action represents actions by group members directed at enhancing the conditions of the group as a unit such as petitions, demonstrations, riots, boycotts, and sit-ins. There are numerous explanations to collective action such as relative deprivation, intergroup, social identity, intergroup emotion, and resource mobilization theories. Classical theories indicate that people mostly protests to express their grievances emanating from frustration, relative deprivation, or perceived injustice. Scholars of social movements have hig hlighted that efficacy, opportunities, and resources can be utilized to predict protest participation (Tilly 2008, p.8). Politics within networks enhance efficacy and transform individual grievances into shared grievances and group-based anger that yields protest participation. At the heart of social movement phenomena is the protest event, whereby protest events are in numerous ways the front line of action within social movements. It is essential to recognize that social protests represent a collective action that is not synonymous with collective behaviours such as riots. Collection

Impacts of the French and Industrial Revolutions Essay

Impacts of the French and Industrial Revolutions - Essay Example Before the Revolution, many European countries and leaders thought of democracy as an unworkable political system. Nevertheless, the perception of the political system that was participatory and popular only began to take shape in Europe after the advent of the French Revolution (Western Civilization, 2012).The French revolution also brought about religious tolerance. Before the French revolution, there were several instances of religious feuds and tensions among Christians and Muslims. This is because Islam was not given much recognition. However, this changed immediately after the French revolution where different religions started getting recognition across Europe (Western Civilization, 2012).   The impact of the French revolution on politics could also be seen in that it caused nationalism and the idea of one nationality in one country. This ideology later resulted in the development of new refugees, known as political refugees. This gave the government the power to have greate r influence on people in Europe. Olwen (1992) points out that the French Revolution was fundamental in making the obligation of the government central to political affairs. In this regard, he reveals that the state became the all-universal power of nations in lost cases. To prove his argument, he lists several European nations which underwent democratic meltdowns before becoming dictatorial states. Some of these include the Soviet Union, Italy, Hungary, Albania, Turkey, Portugal, Germany, Greece, Lithuania, Hungary, Australia.... Historians argue that before the French revolution, there were several human rights violations as people were denied the freedom of movement and speech. These were only allowed for those in power. The French Revolution created a perception of universal human rights (Olwen, 1992). Before the Revolution, many European countries and leaders thought of democracy as an unworkable political system. Nevertheless, the perception of the political system that was participatory and popular only began to take shape in Europe after the advent of the French Revolution (Western Civilization, 2012). The French revolution also brought about religious tolerance. Before the French revolution, there were several instances of religious feuds and tensions among Christians and Muslims. This is because Islam was not given much recognition. However, this changed immediately after the French revolution where different religions started getting recognition across Europe (Western Civilization, 2012). The impact of the French revolution on politics could also be seen in that it caused nationalism and the idea of one nationality in one country. This ideology later resulted in the development of new refugees, known as political refugees. This gave the government the power to have greater influence on people in Europe. Olwen (1992) points out that the French Revolution was fundamental in making the obligation of the government central to political affairs. In this regard, he reveals that the state became the all-universal power of nations in lost cases. To prove his argument, he lists several European nations which underwent democratic meltdowns before becoming dictatorial states. Some of these include the Soviet Union, Italy, Hungary, Albania, Turkey, Portugal,

Career in retail Essay Example | Topics and Well Written Essays - 750 words

Career in retail - Essay Example 3. This position matches with the necessary skills that I have learnt as part of my education and would provide me with an ideal opportunity to put the skills to good use. Further, the job would be a good fit for me given my personality traits and other characteristics that would match the skill set requirements of the job. All in all, the job would be an ideal starting point for me and for my career into the Canadian retail industry. 4. The pros of the job are that I would be utilizing my educational background and put to use the skills that I have learnt. The job would entail training in the areas of business and management along with finance and contracting. This would enable me to pursue the related skill sets and gain valuable insights into these fields. The biggest advantage of this job is that I would be given responsibility over an entire Franchise and hence this would be an ideal start to my career in the Canadian Retail industry. 5. The cons of the job are that since the position entails responsibilities beyond the normal ones that are part of a job in the retail industry, I would have to ensure that I scale up my performance level and work longer and harder. Though I would not necessarily see this as a negative, the fact remains that this would certainly add to the burden and I have to put in that much more work to measure up to the specifications. 6. I believe that the salary being offered is reasonable considering my qualifications and the demands of the job. There is nothing in the compensation package to suggest that the salary being offered is below my expectations or is somehow not consistent with the job description. Further, I am enthused by the fact that the package involves perquisites that make up for any deficiencies in the monetary compensation. 7. http://www.olx.ca/retail-jobs-cat-386 This job posting is

Read the document I send you carefully Essay Example | Topics and Well Written Essays - 1500 words

Read the document I send you carefully - Essay Example With every market structure, however, comes advantages and disadvantages of adopting that particular choice. There are mainly four types of market structures with â€Å"perfect competition†on one extreme and â€Å"monopoly†on the other (Baumol, 1961, p.142. Furthermore, â€Å"monopolistic competition†and â€Å"oligopoly† are those salient structures that are counted asthe moderate ones. In this paper, we will be focusing primarily on the Perfect markets. It will incorporate an analysis ontheir relation to consumer demand and the comparison to any other market structure in the economy. PERFECT COMPETITION AND MARKET DEMAND Perfect Market: Perfect competition is â€Å"a very large number of firms producing a standardized product.† (McConnel&Brue, 2004) This means that a perfect market is that structure which entails numerous extents of â€Å"buyers and sellers† for selling the same kinds of product. Besides this, there are several other noticea ble characteristics of a perfect market that are being listed below: In competition oriented perfect market, there are groups of buyers and sellers who are involved. ... Lastly, there is perfect information about prices and technology among both the sellers and buyers. (Besanko&Brauetigam, 2010, p.330) The Perfect Market and the Demand Curve: The demand curve of a perfect market is perfectly elastic which means that it is a horizontal line. â€Å"The price elasticity of demand (PED) for a good is a measure of the degree of responsiveness of the quantity demanded to a change in the price, ceteris paribus.† (Quek, 2011, p.2). It happens so because of the fact that the presence of small firms in the market makes it difficult for them to influence the pricing fluctuations of the goods and services that they offer. This leads to an inflexible proposition of prices of products to the consumers and thus, a perfectly elastic demand curve is achieved in this context. The figure below illustrates the demand curve: Figure 1: Chart showing perfectly elastic demand in a perfect market (Source: Google Images) Quek propagates thatâ€Å"demand curve in a per fectly competitive firm is also its marginal revenue curve† (2011, p.2). â€Å"Marginal revenue†can be understood as the revenue received by selling one extra unit of production. The demand curve and marginal revenue curve are equivalent in a perfect market competition since the price of goods and services are preciselythe same. The demand curve is identical to the average revenue as well in a perfect market because each product is sold at the same price i.e. the average of the total production. An increase in the price of products in a perfect market leads to the quantity demanded of that product to rise to infinity while a decrease in price leads to the quantity demanded of the product to fall to zero. This is also