Negative Feedback Essay Example for Free

Negative Feedback Essay Negative feedback is the process by which the outputs tend to reduce the inputs, which causes the system to stabilize. It is found in many functions that organisms carry out on a daily basis, most notably homeostasis. Negative feedback can be seen during the menstrual cycle, during days 5-10 oestrogen levels slowly rise, this increase causes the release of the hormones FSH and LH to be inhibited. Also in low concentrations progesterone has a negative feedback effect on FSH, this means that more follicles cant be stimulated during the second half of the cycle. Moreover, once levels of progesterone are high, it inhibits the production of the hormone LH, meaning the corpus luteum is no longer stimulated to make progesterone, so it could be said that progesterone effectively turns itself off unless pregnancy occurs. Negative feedback can also be witnessed in childhood growth, the pituitary gland produces thyroid stimulating hormone, which is used to create the materials necessary to grow. The amount of TSH produced is controlled by negative feedback. Homeostasis, or the maintenance of a constant internal environment is also mainly controlled by negative feedback. For example, thermoregulation works because if the temperature falls below normal the body will initiate a response such as shivering, however as the temperature returns to normal the corrective mechanism will be reduced. Similarily negative feedback also controls Osmoregulation, if osmoreceptors detect change in the concentration of the blood, for example it may be too high the hormone ADH is released which targets the distal convulated tubule, causing it to become more permeable to water so that more is reabsorbed into the blood, reducing the concentration. Negative feedback is also a crucial part of controlling blood glucose levels, for example if the islets of Langerhans detect a fall in blood glucose levels, the alpha cells release glucagon, which in turn activates the conversion of glycogen to glucose within cells so it can be released in to the blood. As the levels of glucose in the blood increase the amount of glucagon released will decrease until it reaches normal. Negative feedback is an essential process that helps regulate many of the processes that enable us to live.

Isolation in A Rose for Emily Essay -- essays papers

Isolation in A Rose for Emily The year is 1852, Emily Grierson has just been born into the small town of Jefferson. A town she will soon discover has distinct hierarchial differences and social classes that are to be followed by everyone in her community. However this same community and the values which it holds will eventually be a key factor in determining Miss Emily's madness. "A Rose for Emily", tells the story of a woman who fails to live up to her high reputation and fitting in a community where almost everyone knows each others business. William Faulkner lets the reader into the life of Emily Grierson from two different key perspectives, man and woman. The men represent respectful affection towards Emily, while the women are just plain curious and enjoy gossiping behind her back. In this story Faulkner reveals how a community's actions, or in this case, lack of action can contribute to one's madness. Faulkner opens "A Rose for Emily" with a lengthy fifty-six-word single sentence that shows the community's reaction to her death and describes the scene through gender differences. Although both men and women attend the funeral, they do so for very distinct reasons. Faulkner writes, "When Miss Emily died, our whole town went to her funeral: the men through a sort of respectful affection for a fallen monument, the women mostly out of curiosity to see the inside of her house, which no one save an old manservant- a combined gardener and cook- had seen in at least ten years" (p.52-53). With this initial passage we see what motivates the townspeople to attend Emily's funeral. Although the men attend the funeral to show a sort of respectful affection, the reader gets the feeling that the men have attended because th... ...uses to enter. It is safe to say that there are a large number of factors that help contribute to Miss Emily's madness. Her father's over controlling relationship, is not a healthy one and does not really prepare her for dealing with relationships in the future. However, when her father dies she does not receive the support she deserves from the community, simply because of her high patriarchal status. She is not regarded as a real person, who has feelings just like anyone else, instead she is put on a pedestal that she can not live up to and like an old fallen monument she leaves the people of Jefferson behind, without having a friend or someone that even cared about her. Maybe if someone would have come to her in her time of need she could have received the help she desperately needed and maybe she might have lead a fulfilling, normal and enjoyable life.

Buddhism vs Jainism

There are great differences as well as similarities when comparing Buddhism and Jainism. The major difference that stands out to me would the doctrines of these religions. Mahavira and Buddha parted ways over doctrine differences. Mahavira and Buddha were powerful and charismatic in the eyes of society. They both obtained the amazing skill to convince and influence which are extremely important in start-up religions. Naturally, these two religions often disagreed over finer aspects of their prospective beliefs. Buddhism was more defined in its criticizing of Jainism. Both sought to convert others. The leaders of the two seemed to have put great efforts in support of finding converts. Both leaders, Buddha and Mahavira were from royal families. Mahavira was the last and most popular of the thirthakaras. These people worshipped in temples as â€Å"enlighten beings† who live on earth as humans. Buddhism was actually founded by Siddharta Gautama who later became Buddha entering his mother’s right side white elephant. Jainism and Buddhism were considered atheistic religions. Neither believes a â€Å"supreme God† exist. However, Buddhism seems to be more agnostic due to speculation that Buddha refused to publicly denounce or dismissed the idea of a â€Å"supreme God†. Both Jainism and Buddhism believe that karma is the force that is responsible for suffering on earth. Unlike Buddhism, Jains believe karma is not just a result of ones actions. However, karma is a real substance that becomes attached to each jiva, like impurity, performing many actions while on earth. In Buddhism the eightfold Path and four Noble Truths are what are needed to minimize the effects of negative karma and strive for their ‘salvation’. Both religions believe in liberation. There are great differences regarding who achieves this. Jains believe souls become entangled in the causative phenomena and fall to the law of karma. If liberated souls are pure and divine, but if bound they result in birth and death. According to Jain doctrine, the soul can free itself from suffering of physical life by leading a pure life as taught the thirrthankaras. Buddhism does not believe eternal souls exist. Therefore liberation is physical and mental perspective. This would be considered an individualistic approach. This indicates this person is not eternal neither Devine. Nirvana is a state in which the person’s personality becomes free. Buddhism opposed the order of the Vedic society system that divides people in caste. The Jain did not technically oppose the cast system; however everyone was treated equally under the umbrella of Jainism. Buddha’s teachings also revealed that humans suffered on earth as a direct result of negative karma, becoming attached and full of worldly desires. The Buddhism belief is the world is filled with evil and discomfort. Man is bound to the cycle of births and deaths until righteously committed. Buddhism opposed rituals of Vedic religion and concentrated more on righteous living to achieve liberation. Jainism did not oppose religious rituals. They worshipped the thithankaras in Jain temples. Jain is an austere religion; it focuses more on the individual’s actions and purity for gaining liberation. Buddhism has gained more notoriety than Jainism worldwide, most likely due to its practices. Besides, a major difference lies in the dominions of both the religions. Though both, Buddhism and Jainism, developed and originated individually in India, but difference how they went about teaching and converting. While Buddhism went abroad to other parts of the India, Central Asia, far eastern countries, and parts of North America and Europe as well. Jainism remained confined to India and seems to stagnate as it pertains to growth. Buddhism today is culturally diverse.

A Military Officer At The Time - 1674 Words

Constantine was born in Naissus, upper Moesia on February 27th 285 ad, and was the son of Helena who was a barmaid. His father Constantius Chlorus was a military officer at the time. In 293 AD, while his father constantius was at the rank of Caesar, Constantine attended the court of Diocletian. His father was given the control of Gaul ( Fance). He was soon after promoted to Caesar. Rise of Diocletian Third century Rome was run down by constant barbarous attacks from the north. Diocletian becomes Rome s new emperor. He proposed new ways on how the frontiers should be defended, creating a mobile imperial army. One of his most skilled soldiers was Constantine 17 years old at the time. While under Diocletian s rule Constantine was a soldier†¦show more content†¦He worked with a variety of pagan and Christian scholars. Christianity became my fluent within the Roman Empire. The religion began taking over building structures and was starting to flourish. During that time there were widespread persecutions of Christians in 303 AD. There were large amounts of arrests, vandalism of churches, and executions in Rome. ( biography) Only about ten percent of the Roman population had Christian beliefs passed down to them at the time of the crisis. (patterns). Diocletian believed that the only way to achieve complete unification or Rome and complete control over the Pagan religion was b y destroying the Christian beliefs within the whole Roman Empire. Constantine’s achievements. Later on Constantine was proving much promise and was seen to have much potential when serving under the Diocletian s and Caesar Galerius when going up against the Persians. Two years later in 305 ad he started opposing such actions against the Christian people and left the Galerius court. He later joined his father in Britain where he made a base at York. â€Å" My father revered the Christian God and uniformly prospered, while the emperors who worshiped the heathen gds died a miserable death; therefore, that I may enjoy a happy life and reign, will imitate the example of my father and join myslef to the cause of the Christians, who are growing daily, while the heathen are diminishing† Constantine. His father died