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

European Single Market Essay Example | Topics and Well Written Essays - 3500 words

European Single Market - Essay Example The Treaty on the Functioning of the European Union is an international treaty between the European Union member states that forms the basis of the EU’s constitutional base. This treaty describes at length the policies, role and functioning of the EU. Chapter 3 of the Treaty on the Functioning of the European Union enumerates the â€Å"Prohibition of Quantitative Restrictions between Member States†. The Article 34 under this chapter states that â€Å"Quantitative restrictions on imports and all measures having equivalent effect shall be prohibited between the Member States.† (Similarly Article 35 prevents the member states from placing similar quantitative restrictions on export of goods). According to the rules of this Article, the member states Ultra and Media were not entitled to place any sort of restriction on Infran’s production of tomatoes and cucumbers. In a counter argument, the authorities of Ultra and Media could have declared that both of them were justified in prohibiting Infran’s products into their markets, under Article 36 of the Treaty. Article 36 states that â€Å"The provisions of Article 34 and Article 35 (regarding quantitative restrictions on export) shall not preclude prohibitions or restrictions on imports, exports or goods in transit justified on grounds of public morality, public policy or public security; the protection of health and life of humans, animals or plants;†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Such Prohibition or restriction shall not, however constitute a means of arbitrary discrimination or a disguised restriction on trade between Member States†. (The Treaty on the Functioning of the European Union

Spectrums in physics Essay Example | Topics and Well Written Essays - 750 words

Spectrums in physics - Essay Example Light forms a continuous spectrum but human eyes are only capable of seeing the spectrum of visible light corresponding to â€Å"a wavelength range of 400 to 700 nanometers and a color range of violet through red† (Kusterer, 2007). This means that normal human vision has a limited visual range and can perceive only to such an extent. Among the visible colors, violet has the shortest wavelength at 400 nm. Indigo follows it closely at around 445 nm while the wavelength for the blue light that gives color to the sky measures 475 nm. Green comes next with about 510 nm while yellow follows closely at 570 nm and orange at 590 nm. The last visible color in the spectrum is red, with a wavelength range of 650 nm through 700 nm. The colors with relatively longer wavelengths, red and orange, are usually â€Å"less efficiently scattered† so they are more readily seen at sunrise and sunset. Blue and violet light, on the other hand, are normally scattered. So far, this is the visible and observed spectrum of light of which the normal human eye is capable. (Kusterer, 2007) Since light is a continuous spectra, there are numerous wavelengths in the electromagnetic spectrum that normal human vision cannot perceive. Some of this light energy includes those with wavelengths that are too short for the human eye to see. These include ultraviolet light and the spectra of light that causes sunburns and the same light used for skin tanning. Another spectra of light which remains invisible to the human eye includes those with wavelengths that are considered too long for normal human vision to perceive. These include infrared light and those that make adjacent things hot such as light energy coming from the campfire or stove burner. Light spectra with very long wavelengths are usually significant in that they â€Å"radiate heat to outer space† for if they do not do so, the solar energy absorbed by the Earth would remain trapped and continue to heat the planet. (Kusterer,

Ppt About Forbidden City Essay Example for Free

Ppt About Forbidden City Essay 1 Introduction The Forbidden City, also called the Palace Museum, which was the imperial palace during the Ming and Qing dynasties. The Forbidden City was built from 1406 to 1420 by the Yongle Emperor who was the third emperor of the Ming Dynasty. The English name of the Forbidden City is a translation of its Chinese name Zijin Cheng, which means that the Forbidden City is the residence of the emperor and his family, and no one could enter or leave the palace without the emperors approval. The Forbidden City is a rectangle 961 metres from north to south and 753 metres from east to west. Besides, it consists of 980 surviving buildings with 8,886 bays of rooms. It is obviously the largest palace around the world. As the home of 24 emperors, 12 of the Ming Dynasty, and 10 of the Qing Dynasty, the palace was the political centre of China for more than 500 years, and this is one of the reasons why we interested in this topic. In the following sections, we will introduce the Forbidden City’s three main halls, The Hall of Mental Cultivation, the famous emperors and the stories of the palace, famous music about the Forbidden City, online virtual Forbidden City, and the best time to travel. 2 Descriptions 2-1 The three main halls There are three halls stand on top of a three-tiered white marble terrace of the square of the palace. They contain the Hall of Supreme Harmony (Chinese: Ã¥ ¤ ªÃ¥â€™Å'æ ® ¿), the Hall of Central Harmony(Chinese: ä ¸ ­Ã¥â€™Å'æ ® ¿), and the Hall of Preserving Harmony (Chinese: ä ¿ Ã¥â€™Å'æ ® ¿). The Hall of Supreme Harmony is the largest and highest level hall of the Forbidden City. Every emperor’s coronation, birthday ceremony, wedding ceremony, and other important ceremonies or political affairs had taken place in this hall. The Hall of Central Harmony is a smaller and square hall, used by the Emperor to rehearse and rest before and during ceremonies. Behind the Hall of Central Harmony, the Hall of Preserving Harmony, it was used by the emperor to banquet the nobility on every Chinese Eve, or other important festivals. In Qing Dynasty, the emperor had taken the most important imperial examinations, Dian Shi (Chinese: æ ® ¿Ã¨ © ¦) in this hall. 2-2 The Hall of Mental Cultivation The reason why we introduce this hall separately is that the Hall of Mental Cultivation is a particularly significant building of the Forbidden City of Qing Dynasty since 1722. The Hall of Mental Cultivation is well-known for the Yongzheng Emperor, who was the 5th emperor of the Qing Dynasty, and son of the Kangxi Emperor. He ruled the Chinese Empire from 1722 to 1735. During his ruling time, the emperor lived in this hall. After his death, other emperors lived in this hall continually, thus the hall had been the actual dominate centre of the Chinese Empire from 1722 to 1911, the ruin of the Qing Dynasty.

Artist Pain Exposed in Kafkas A Hunger Artist Essay -- Hunger Artist

Artist Pain Exposed in Kafka's A Hunger Artist      Ã‚  Ã‚   In "A Hunger Artist", Kafka comments on the life of the modern artist through the life of a hunger artist. Kafka comments that the modern artist is always dissatisfied with his or her art. The modern artist also is trapped in a harsh and capricious world, in which the artist struggles to maintain his or her audience by pushing the extreme, but are cheated because they do not receive his or her recognition. Finally, in "A Hunger Artist" Kafka refers to the modern artist's struggle between the need for fame and the need for isolation. As a modern artist, Kafka has experienced the qualities that characterize the modern artist and his experiences have greatly influenced his work, particularly "A Hunger Artist".    The modern artist, as seen with the hunger artist, will always have dissatisfaction with his or her art. The hunger artist was dissatisfied with his work because he was dissatisfied with himself. He was dissatisfied because fasting was easy for him. Although he reveled to the world his secret, the world did not understand him and some even had the "imprudence" to call him a cheat. The hunger artist was also dissatisfied because he wanted to fast for more than forty days, but the impresario refused. Critic Frederick Karl remarks that the hunger artist could only find satisfaction when he achieves purification the closer he comes to the fine line when life and death touch.i[i] Kafka, a modern artist, was dissatisfied with his works. He attempted to achieve purification and perfection through a strict diet and lifestyle, but he failed to make his writings perfect and demanded that his works be burned after he died.ii[ii]      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   According to Kafka,... ...position in society. The modern artist is an outsider, or rather, a joke that "happened to be in fashion". The artist is doomed to rejection and isolation by a harsh and capricious world.    End Notes i Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991. ii Updike, John. Foreword to Franz Kafka: The Complete Stories. New York: Schoken Books, 1971. iii Winkler, R.O.C.. Twentieth Century Literary Criticism Vol. 2. New York: Gale Research, 1981 iv Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991. v Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International   Publishing Corporation, 1991. vi Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991. Artist Pain Exposed in Kafka's A Hunger Artist Essay -- Hunger Artist Artist Pain Exposed in Kafka's A Hunger Artist      Ã‚  Ã‚   In "A Hunger Artist", Kafka comments on the life of the modern artist through the life of a hunger artist. Kafka comments that the modern artist is always dissatisfied with his or her art. The modern artist also is trapped in a harsh and capricious world, in which the artist struggles to maintain his or her audience by pushing the extreme, but are cheated because they do not receive his or her recognition. Finally, in "A Hunger Artist" Kafka refers to the modern artist's struggle between the need for fame and the need for isolation. As a modern artist, Kafka has experienced the qualities that characterize the modern artist and his experiences have greatly influenced his work, particularly "A Hunger Artist".    The modern artist, as seen with the hunger artist, will always have dissatisfaction with his or her art. The hunger artist was dissatisfied with his work because he was dissatisfied with himself. He was dissatisfied because fasting was easy for him. Although he reveled to the world his secret, the world did not understand him and some even had the "imprudence" to call him a cheat. The hunger artist was also dissatisfied because he wanted to fast for more than forty days, but the impresario refused. Critic Frederick Karl remarks that the hunger artist could only find satisfaction when he achieves purification the closer he comes to the fine line when life and death touch.i[i] Kafka, a modern artist, was dissatisfied with his works. He attempted to achieve purification and perfection through a strict diet and lifestyle, but he failed to make his writings perfect and demanded that his works be burned after he died.ii[ii]      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   According to Kafka,... ...position in society. The modern artist is an outsider, or rather, a joke that "happened to be in fashion". The artist is doomed to rejection and isolation by a harsh and capricious world.    End Notes i Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991. ii Updike, John. Foreword to Franz Kafka: The Complete Stories. New York: Schoken Books, 1971. iii Winkler, R.O.C.. Twentieth Century Literary Criticism Vol. 2. New York: Gale Research, 1981 iv Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991. v Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International   Publishing Corporation, 1991. vi Karl, Frederick. Franz Kafka: Representative Man. New York: Fromm International Publishing Corporation, 1991.

Statistics homework

Consider the percent change in housing values over a five-year period for regions of the United States, as shown In the following table. Draw a box plot. Percent change In housing values over five years for U. S. Regions. Region Percent Change Percent Change New England Region 54. 5% West 29. 5 North Central 38. 3% pacific Middle Atlantic 35. 3 48. 9 East North Central 33. 6 East South Central 26. 0 Mountain West South Central 32. 0 South Atlantic 34. 2 4. Two events are mutually exclusive, one with probability 0. 38 and the other with arability 0. 54. A. Find the probability that the first event happens given that the second event happens.O b. Find the probability of the union of these two events. 0. 38+0. 54=0. 92 5. Your store is interested in learning more about customers' purchasing patterns and how they relate to the frequency of store visits. The probability that a customer's visit will result In a purchase Is 0. 35. The probability that a customer has been to the store wealth the past month Is 0. 20. Of those who did not buy anything, 12% had been there within the past month. A. Find the probability of making a purchase given that the customer had been to the store within the past month. O. 1 b. What percent of customers are frequent shoppers, defined as making a purchase and having been to the store within the past month? O. 122 6. Keep Cool Pity Ltd manufactures window alarm-conditioners In both a deluxe model and a standard model. An auditor engaged in a compliance audit of the firm is validating the sales account for April. She has collected 200 invoices for the month, some of which were sent to wholesalers and the remainder to retailers. Of the 140 retail invoices, 28 are for the standard model. Of the wholesale invoices, 24 are for the standard model.If the auditor selects one invoice at random, find the following probabilities: a. The Invoice selected Is for the deluxe model. 0. 74 invoice selected is either a wholesale invoice or an invoice for the standard model. 0. 44 d. Is ‘invoice for deluxe model' independent of Wholesale invoice? No Model Wholesale Total Deluxe Standard 24 148 52 Otto 200 Retail 112 28 140 7. The finance director of a hardware wholesaler has asked the accountant to ring all customers five days before their account payments are due, as a means of reducing the number of late payments.

Karl Marx and Marxist Class Struggle

Marxist Approach Marx’s Beliefs: Philosophy was meant to be used as a tool to bring about change. The capitalist system caused the alienation of the workers, therefore causing them not to be able to live to the fullest http://ragingdove12603. tripod. com/id13. html Queen, Plaid, and Big Tall Goony-Goony walk into A&P in â€Å"nothing but bathing suits†, and don’t â€Å"even have shoes on†. The girls walking in â€Å"naked† and â€Å"barefoot† can represent a Marxist class struggle. Sammy’s high admiration and observance from behind the cashier towards these girls in the story portrays a Marxist class struggle. He views the girls, especially Queenie, as superior and high-class, and compares himself and the place he works in as â€Å"crummy†. In this case, it’s Sammy who is â€Å"the working-class†, and he tries doing something about his position/status by quitting his job for these high-class girls. He doesn’t see working at A&P or his manager Lengal as desirable as he sees the class of these girls. He struggles in the end with his decision: â€Å"Looking back in the big windows . . . I could see Lengel in my place in the slot . . . and my stomach kind of fell as I felt how hard the world was going to be to me hereafter. Feminist Approach: Sammy as a possible girl â€Å"Being naked approaches being revolutionary; going barefoot is mere populism† – John Updike Populism is a â€Å"political philosophy supporting the rights and power of the people in their struggle against the privileged elite. † â€Å"You know, it’s one thing to have a girl in a bathing suit on the beach . . . and another thing in the cool of the A&P, under the fluorescent lights . . . with her feet paddling along naked over our checkerboard green-and-cream rubber-tile floor. Perhaps Sammy emphasizes â€Å"her† descriptions of the three girls, because she admires their revolution of having to be working women/women under â€Å"policy† and desires their courage and freedom to be â€Å"different†. Or perhaps Sammy desires the freedom and luxury (power) the girls have. By entering A&P â€Å"naked† and â€Å"barefoot† the girls show power/voice to be seen, something uncommon for most girls during the time. They face the consequence of Lengal. Sammy witnessing Lengalembarrass the girls quits to stand up for them, but doesn’t catch their attention.