Physiology of the Menstrual Cycle

The menstrual cycle is a cyclic process in females that, on average, occurs every 28 days. The purpose of the menstrual cycle is to help prepare the body for potential fertilization, implantation, and, consequently, pregnancy. The happenings of the menstrual cycle are consequences of the simultaneously occurring ovarian cycle and uterine cycle. The ovarian cycle occurs in the ovaries and carries out the follicular phase, which spans the first 14 days of a new menstrual cycle. The result is ovulation.The uterine cycle works concurrently with the ovarian cycle and carries out the menstrual, proliferative, and secretory phases. Hormonally, gonadotropin-releasing hormone (GnRH) is released in the hypothalamus and travels to the anterior pituitary of the brain, thus increasing levels of follicule-stimulating hormone (FSH) and leutinizing hormone (LH). The brain acts directly on the follicle cells (in the follicular phase) and the corpus luteum (in the luteal phase) to stimulate a response .The result of hormonal secretions of the hypothalamus and anterior pituitary along with the ovarian and uterine cycle is menstruation. The overall cycle is regulated by the hormones that result from a release of GnRH from the brain. Negative feedback occurs in the early follicular phase and luteal phase of th ovarian cycle as GnRH is released, which causes an increase in FSH and LH levels in the anterior pituitary. In the early follicular phase, these hormones send signals through neurotransmitters that reach receptors on follicle cells and follicular development is enhanced.Simultaneously, plasma levels of estrogen increase and return to the brain to hinder continued LH and FSH secretion. At the end of the follicular phase, positive feedback occurs as high estrogen levels are passed back to the brain and estrogen continues to amount to high levels. In the luteal phase, the brain sends hormonal signals to the corpus luteum. As a result, levels of estrogen and progesterone are heigh tened and progesterone is fed back to the brain to maintain stable levels of LH and FSH.This demonstrates how brain function and hormonal regulation carry out essential, complex processes in the body, such as those of the menstrual cycle. The ovaries originally contain primordial follicles, which are made up of an oocyte (an immature egg) and a layer of follicle cells that envelops it. In the beginning stages of the follicular phase of the menstrual cycle, some of these follicles start to develop, becoming granulosa cells. A fluid-filled cavity called an antrum appears in the follicle and begins to increase in size only to eventually engulf the oocyte.The follicle is now called the Graafian follicle, which soon bursts, and the oocyte leaves the ovary and travels into the fallopian tube, spurring ovulation. The leftover Graafian follicle becomes what is called the corpus luteum. The corpus luteum (â€Å"yellow body†) is a gland that secretes estrogen and progesterone when the menstrual cycle is not in full swing. If fertilization of the oocyte ensues, the corpus luteum remains intact for a fair amount of time in order to regulate the release of estrogen and progesterone.If the oocyte fails to become fertilized, the corpus luteum will disintegrate relatively quickly. At the point of the follicle rupturing, there is a major spike in LH and FSH plasma levels. The uterine cycle is carried out in three phases. The menstrual phase begins on the first day of the menstrual cycle and corresponds with the follicular phase. It lasts about three to five days and sheds the uterine lining. During this phase is when actual menstruation occurs due to a decline in estrogen and progesterone plasma levels that occurred because the corpus luteum had fully deteriorated.The inner lining of the uterus, the endometrium, has blood vessels that now narrow and the endometrial tissue begins to die and shed from the uterus. As it sheds, blood vessels burst and blood and tissue are d ispelled from the vagina. The proliferative phase is next and allows the uterus to refurbish as blood vessels become engulfed again, allowing the uterine lining to thicken. It occurs around day five and lasts until day fourteen, when ovulation has happened. During the proliferative phase, estrogen levels peak.The next phase is the secretory phase, which creates a setting that readily allows for embryo development as glands become engorged due to increased blood flow and secrete fluids that contain glycogen that may act as a food source of glucose for a potential embryo. The secretory phase lasts about the last fourteen days of the menstrual cycle-at the same time as the luteal phase. By the end of this cycle, the corpus luteum has completely diminished and, because it can no longer act as a source of stimulation for estrogen and progesterone release, these two hormone levels drop and menstruation commences as the menstrual phase begins again.Works Cited Bowen, R. â€Å"Luteinizing and Follicle Stimulating Hormones. † Arbl. cvmbs. colostate. edu. 13 May 2004. Web. 09 Feb. 2011. . Cohen, Hilary. â€Å"Menstrual Cycle Home. † Endocrinology of the Menstrual Cycle. 2000. Web. 09 Feb. 2011. . Stanfield, Cindy L. , William J. Germann, Mary Jane. Niles, and Joseph G. Cannon. Principles of Human Physiology. San Francisco: Pearson/Benjamin Cummings, 2008. Print.

Simple Éviter (to Avoid) Conjugations in French

Simple Éviter (to Avoid) Conjugations in French In French,  Ãƒ ©viter  is the verb that means to avoid. When you want to say avoided, avoiding, or will avoid, the verb needs to be conjugated. This can be a challenge with some words, but à ©viter  is a little easier because it follows a standard pattern. Conjugating the French Verb Éviter Éviter  is  a  regular -ER verb. It follows the same verb conjugation pattern as other verbs such as  emprunter  (to borrow) and  durer  (to last). This is the most common pattern in the French language. As you learn more of these conjugations, each new one gets a little easier. The simplest conjugations transform the verb into the present, future, or imperfect past tense. Unlike English where the -ed and -ing endings apply to all subjects, the French verb endings change with each subject pronoun as well as each tense. Use the table to study the various forms of  Ãƒ ©viter  and practice them in context. Simply pair the subject pronoun with the appropriate tense: I avoid is jà ©vite and we will avoid is nous à ©viterons. Subject Present Future Imperfect j vite viterai vitais tu vites viteras vitais il vite vitera vitait nous vitons viterons vitions vous vitez viterez vitiez ils vitent viteront vitaient The Present Participle of Éviter The verb stem of  Ãƒ ©viter  is  Ãƒ ©vit-. We can add -ant  to that and create the  present participle  Ãƒ ©vitant. This is very useful because it can be an adjective, gerund, or noun as well as a verb. The Past Participle and Passà © Composà © A  common way to form the past tense avoided in French is with the  passà © composà ©. To do this, conjugate the  auxiliary verb  avoir  to fit the subject pronoun, then attach the past participle  Ãƒ ©vità ©. For instance, I avoided is jai à ©vità © and we avoided is nous avons à ©vità ©. More Simple  Ãƒâ€°viter  Conjugations Among these simple conjugations of  Ãƒ ©viter, concentrate and practice the verb forms above before moving on. The following conjugations are used less often, but they are useful as you improve your profiecency. For example, the subjunctive verb form can be used when the verbs action is subjective. Likewise, if the verb is dependent on condition   if  this happens,  then  this will happen use the conditional verb form. The passà © simple and imperfect subjunctive are found most often in writing. Subject Subjunctive Conditional Pass Simple Imperfect Subjunctive j vite viterais vitai vitasse tu vites viterais vitas vitasses il vite viterait vita vitt nous vitions viterions vitmes vitassions vous vitiez viteriez vittes vitassiez ils vitent viteraient vitrent vitassiez The imperative verb form is used for exclamations, requests, and demands. When using it, keep things short and sweet and drop the subject pronoun: use à ©vite rather than tu à ©vite. Imperative (tu) vite (nous) vitons (vous) vitez

Smile and Smiling Specific Purpose Essay Example

Smile and Smiling Specific Purpose Essay Example Smile and Smiling Specific Purpose Essay Smile and Smiling Specific Purpose Essay Preparation Outline: Informative Speech on Smiling Specific Purpose: to inform my speech class about the many things Your Smile can do. Thesis: After listening to my speech, my audience should be informed about how â€Å"Your Smile† can do many things; have an effect on you and others around you, and how it has an effect on your brain. Introduction I. Smiling is something most people enjoy. I’m a happy and very positive person, so I smile a lot. It turns out that when I smile, the world smiles back. In my research about smiling I referred to sources such as cbsnews. com, science. owstuffworks. com, bizzikid. co. uk II. Smiling can affect the way you feel. It feels good to smile and be smiled at. People like to be surrounded by others who are positive and make them feel good. III. A smile is a great way to start any conversation, and makes others more receptive to you. It adds to what you have to offer. Transition: Let’s start with how a smile can affect you and o thers around you. Body I. A smile can affect you and others around you. A. It lifts our mood as well as the moods of those around us. B. It can make us appear more attractive to others. C. It can be contagious. D. Make you look younger E. Help you build rapport F. Helps reassure the other person of your sincerity. Transition: Now that we have talked about how your smile can affect you and others around you, let’s move on to how your smile affects your brain. II. How Your Smile Affects Your Brain A. Each time you smile at a person, their brain coaxes them to return the favor. B. Facial changes involved in smiling have direct effects on certain brain activities associated with happiness. Smiling triggers your feel good chemicals in your brain. C. Just the simple act of smiling releases endorphins from the brain into the blood. In conclusion, today we have discussed how your smile can affect you and others around you. We also talked about how a smile affects your brain. Conclusion I. Smiling is a way to promote happiness within yourself and others. Smiling is a very important part of connecting and getting to know someone. II. Choosing to smile can make a difference in everything you do that day. A smile can brighten your mood, improve your outlook, and lead you to make positive choices. So when you smile not only will you make yourself feel better, you will also attract positive energy into your life. References Makes you look younger. Freeman, D. W. (2011, November 10). Smiling makes people look younger, study shows. . Retrieved from cbsnews. com/8301-504763_162-57322365-10391704/smiling-makes-people-look-younger-study-shows/ How your smile affects your brain. science. howstuffworks. com Layton, J. (n. d. ). Retrieved from http://science. howstuffworks. com/life/smilinghappy1. htm Feel good chemicals. Bizzikid . (n. d. ). Retrieved from bizzikid. co. uk/healthwellbeingsmiling. html

2061 A Space Odyssey Three Essays - Space Odyssey Series

2061 A Space Odyssey Three Essays - Space Odyssey Series 2061 A Space Odyssey Three Dr. Heywood Floyd was sitting in the space station Pasture when he saw Haleys comet and decided to actually land on the surface (by convincing Tsung Corporation that it would be good advertising). So off go Dr.Floyd, Dr.Chant, Clifford Greenberg and the Universes crew to Haleys comet. Dr.Rolf van der Berg was called to his office at 5:00 in the morning to find that on Europa There was a new mountain three times the size of Everest had appeared and that a thousand kilometers away from the mountain a monolith about five hundred kilometers wide and a thousand two hundred kilometers long. When Universe landed The passengers were allowed on to the surface but only if they had some body with them so that if something went wrong they could help each other out. Floyd found some caves and decided to investigate it but came back empty handed. After The universe dropped the passengers back off at the moon base the universe was assigned to go pick up a ship that had crash landed on Europa. Universe went to pick up the people when it was hijacked by Universes stewardess and was forced to land when Universe had landed The Hijacker killed her self by shooting herself in the head. after the ship had land the landing pads had sunk into the ground and the hijacker must have thought that they were stranded. After the event with the hijacker the crew decided to explore the mysterious mountain while picking up the survivors. When they got to the mountain they realized that it was in fact a diamond three times the size as Everett. Dr.Chant took some samples and picked up the survivors. When they were flying back they noticed some thing on the ground it was a small village but no body was there. The universe landed and looked around and found no one then Floyd saw David Bowman, David said The people here have fled to there waters and will be back once your poison has gone. and then he vanished. Floyd wondered about this for a moment and remembered that when an oxygen producing planet had been created it killed off all the other planets, and that was what there exhaust was or at least mostly. The universe left and headed home once again. Year: 3000 The Monolith that was discovered on the moon is sitting in a museum now just sitting there when suddenly something happened after 4 million years it reawakens!.

Nationalism and The Israeli- Plastianian confilict Essay

Nationalism and The Israeli- Plastianian confilict - Essay Example ower of a nation, the ability of modern states to provide the needs of its citizenship depends on a whole set of global and domestic actors that have more than diluted the very fundamentals of nationalism. At the core of this phenomenal decline is the boom in information and informational technologies. Notwithstanding the foregoing, national identity remains enormously important. As globalization continues to transform the world, the very significance nationalistic perceptions of state-sovereignty, citizenship, and inter-state relations will continue to depreciate even further, with their relevance dependent much on the changes and adaptations to the emerging forces that are set to get even more deleterious.   The iron wall, a policy instituted by the hard-line Zionists in Israel with regards to dealing with the Arabs towards finding a lasting peace has had very little effect in terms of actualizing its very purpose. That though the policy has brought forth a comparatively stronger Israel relative to its neighbors militarily, the hard stance has only served to portray the nation’s military actions in uncompromising lenses, thus, the regressive peace agreement that has more than thrown numerous opportunities into disarray. The film on the same is, however, full of facts on the ground, but is far from balanced, for it majors on the views of one and only person, Vladimir Jabotinsky. The issues raised therein, though, remains crucial in determining the facets of a lasting peace in the

The process of globalisation and its impacts on international business Essay

The process of globalisation and its impacts on international business activities - Essay Example ocess is further understood in the 20th century colonialism in Africa and Latin America, where the capitalists seek to extend their dominion and individualism ideas to the ‘new’ worlds. During this epoch, new economies emerged through the adoption of capitalistic model of governance, which catapulted the Western European countries to financial glory in the early 19th century. Mann (2006) summarises in his book that the process of Globalization was deeply founded in imperialism. Economies opened up for accrual in the First World realms at the cost of exploitation of the Third World nations. In this phase, the outlook of Globalization relied on the leadership fashion of the rulers of that time. The leadership mentality enabled the imperialists distinctively segregate people based on social strata, enabling them further exploit the Third World countries. The raw materials from these nations were extracted and utilised in military and administrative developments by the First World countries; this way, the economies continued to flourish whereas the poor nations were hard-pressed more to paucity. The next stage of Globalization centred on inter-imperial business actions. The joint trade between the European states, the United States of America and more recently, Japan founded a chain of groups on regional echelon, collectively with the governing powers. The economic alliances gave rise to collaborations and competitions in the business realm, leading to a faceoff for market share control by the multinationals. The coalition also bolstered the exploitation of the Third World markets more effective (McCarthy, 2012). Foreign trade forms a fundamental part of Globalization. Transfer of supplies on an international scale is closely interlaced with the different orders of the social ladder and the commercial markets. The nature of the relationship helps the facade of Globalization attain a class disposition (Gilbertson, 2009). As much as the morphology of

Morality and Social Responsibility Assignment Example | Topics and Well Written Essays - 500 words

Morality and Social Responsibility - Assignment Example This shows that a person’s wrong behavior solely originates from himself and he bares the whole responsibility. This may be too hard on those who may not understand the rules and end up breaking them. Human beings have different reasoning standards. As others are keen to point out the limits of their actions, others may be slow at it. Actions play a big role in the definition of morality. The actions between two or more individuals define character. These actions originate from different or same habits that these individuals have. One’s action will influence the reaction of another, defining his character. This introduces a second party responsible for one’s action. Therefore, environment (culture) plays a role in defining ones morality (Peter & Nicholas, 2011) A person’s upbringing influences the virtues that he will have when he comes of age. Some virtues are inborn while others are acquired. Culture outlines the norms of one’s society. Many do see that abiding by these norms makes one moral. Culture defines people’s social responsibility, and it enables smooth co-existence among people (Scarlet & Arthur, 2011). This social responsibility can be seen as ones duty to morality. The actions that are done usually are of different purposes. An individual can do action because he needs to benefit by protecting his life. On the other hand, it can be done just for the respect of the law to avoid consequences. In the end these actions, regardless of the reasons for performing them, defines ones morality. Deontology helps to control individuals’ actions and the rights of others who interact. People should reflect on the consequences of their actions to others, before doing them. As people who co-exist, cultural laws outline the moral acts that all of them approve. This helps in the establishment of morality amongst them. Morality may be different in different cultures since the cultures tend to differ in