The Immune System of the Body-Free-Samples-Myassignmenthelp.com

Question: Describe the Sequence of Immunological Events that Occur in a Type 1 Hypersensitivity Reaction during both the Primary Exposure to an ntigen (Sensitisation) and for Subsequent Exposures Resulting In Allergic Symptoms. Answer: The immune system of the body is the integral element of normal body functioning whose main function is to protect the body from diseases. However, the protective immune mechanisms might at times lead to detrimental reactions in the body. These reactions are known as hypersensitivity reactions which might be of various forms. Type I hypersensitivity is the allergic reaction that is triggered by reexposure to any antigen that is also to be known as an allergen. Type 1 hypersensitivity reaction involves immunoglobulin E (IgE) mediated release of histamine as well as other mediators from basophils and mast cells. This condition leads to undesirable and excessive reactions that are produced by the normal immune system (Delves et al. 2017). Type 1 hypersensitivity reaction is called as immediate or anaphylactic hypersensitivity. The reaction involves eyes, skin, nasopharynx, gastrointestinal tract, bronchopulmonary tissues. The mechanism of action is marked by the preferential production of IgE which is caused as a response to certain antigens, also referred to as allergens. When an individual gets exposed to such antigens, they preferentially produce an increased amount of TH2 cells. These cells in turn secrete IL4, IL5, and IL 13. This favour IgE class switch in turn. IgE has a high affinity for the receptors on mast cells and basophils. When the same person is exposed to the same allergen, there is a cross-linking of the cell bond IgE, triggering the rapid release of different substances that ar pharmacologically active. Mast cell triggering is mediated by the cross-linking of IgE Fc- receptor. Increased influx of Ca++ precedes degranulation of mast cells that acts as a crucial process. Degranulation is also promoted by ionophores responsible for increasing cytoplasmic Ca++. The agents released mainly include histamine, tryptase, kininogenase, prostaglandins, leukotriene and platelet activation factor (PAF). PAF is responsible for amplifying the reaction leading to platelet aggregation as well as the release of histamine and other agents. Neutrophil chemotactic factors and Eosinophil chemotactic factor of anaphylaxis (ECF-A) attract neutrophils and eosinophils that in turn cause the release of different enzymes with hydrolytic properties. As a result, the cells suffer necrosis. Cyclic nucleotides play a crucial role in modulating the type 1 hypersensitivity reaction. The allergic reaction can be diagnosed with tests that measure total IgE in the body and particular IgE antibodies against the allergens (Abbas, Lichtman and Pillai 2014). Exposure to the different allergens might be ingested, injected, inhaled and coming to direct contact. As a result of the hypersensitivity reaction, there is inflammation at the particular site of since the blood flow to the tissues that are affected is considerably increased. The reactions that the body suffers might be either systemic or local. Symptoms suffered by the person might be mild, such as an irritation, or sudden death as a result of the anaphylactic shock. Anaphylactic shock is often characterised by an unexpected and rapid drop in the blood pressure and difficulties in breathing due to the exposure to the substances. Some common examples of type 1 hypersensitivity reaction include allergic asthma, anaphylaxis, allergic conjunctivitis, eosinophilia and angiooedema. Some frequent antigenic allergens are insect stings, foods, additives, pollens and animal dander (Khalili et al. 2016). References Abbas, A.K., Lichtman, A.H. and Pillai, S., 2014.Basic immunology: functions and disorders of the immune system. Elsevier Health Sciences. Delves, P.J., Martin, S.J., Burton, D.R. and Roitt, I.M., 2017.Essential immunology. John Wiley Sons. Khalili, A., Khayatzadeh, A., Ebrahimi, M., Rafiemanesh, H., Azizi, G. and Movahedi, M., 2016. Evaluation of Tolerance in Patients With Type-1 Hypersensitivity Reaction to Wheat After Oral Immunotherapy.Journal of investigational allergology clinical immunology,26(5), pp.339-340.

Things Fall Apart Essays (1849 words) - Postcolonial Literature

Things Fall Apart The Ibo society in Africa is very different from the American society that I am used to. One of the major differences is the way women are treated. On page 37 of Things Fall Apart by Chinua Achebe, Okonkwo conveys that ?no matter how prosperous a man was, if he was unable to rule his women and children (and especially his women) he was not really a man.? On page 94 Okonkwo's uncle says ?we all know that a man is the head of the family and his wives do his bidding.? This shows us that women in the Ibo society are considered subservient to the men of the society and are sometimes mistreated, however they are still very important to society. This is evident in many other places throughout the book Things Fall Apart. The way women are referred to in the book tells about their social standing as well. Many times women are referred to by their relationship to a man. There are many references to ?Nyowe's mother? and? Okonkwo's first wife,? but Ekwefi is seldom called by her name. The same goes with ?the wife of Ogbuefi Udo? who was murdered by the members of another African village near Umofia. In the first chapter of the book we see how women are expected to do what their husbands say with no questions asked. When Ikemefuna comes to Umofia and is put under Okonkwo's care he (Okonkwo) immediately calls for his first wife and says ?look after him,? when she asks a question regarding the boy, Okonkwo says ?do what you are told woman? to which his first wife responds by taking Ikemefuna into her hut, asking no more questions. The only two women who are consistently referred to by their name throughout the book are Ezinma and Chielo. That is because Ezinma is very special to her father, Okonkwo, and Chielo is the priestess of the oracle. On pages 122 and 123, Okonkwo thinks to himself that Ezinma is special because ?of all his children she alone understood his every mood.? On many occasions throughout the book, Okonkwo says, ?I wish she were a boy.? Sons are more respected in the Ibo society than daughters. There is a special bond between Ezinma and Okonkwo because, according to him, she has the ?right spirit.? When Ekwefi wakes Okonkwo up in the middle of the night, he is upset because he doesn't want to be bothered, but when he finds out that it is because Ezinma is dying, he springs up from bed and rushes out to get her some medicine. This shows that daughters are not without value in the Ibo society. Ezinma is special not only to her father, but to her mother as well. I think it is because Ekwefi had nine miscarriages before she had Ezinma and since the girl was considered an obanje, Ekwefi was extremely happy when her iyi-uwa was found so she would no longer die and be reborn in a horrible cycle. Although Okonkwo looks down on showing emotions (or weakness as he considers it) he is quick to follow his wife when she follows Chielo and Ezinma to the shrine of the oracle, and he tells her to go home and rest and he will wait for them to come out of the cave. The next morning he makes four trips to and from that same spot worried about Ezinma (although he is too proud to admit it). Chielo is well respected and feared throughout the village of Umofia because she holds a religious position that is very important to all members of the Ibo society. As the priestess of the oracle, the entire village depends upon her to relay messages of the gods and to do their (the gods) bidding. An example of this is when she takes Ezinma in the middle of the night out to the cave where the oracle lives, despite Ezinma's parents protest. Although women are somewhat looked down upon they are also portrayed as brave and important to their society, they are trusted with responsibilities, such as gathering firewood, cooking, cleaning, and child rearing. Women weed the farms three times during the growing season of the yams. They also

A Sample Tok Essay - Writing Style

A Sample Tok Essay - Writing StyleA sample of the essay can show you what to look for when preparing your own. The sample tok you have created will be a good guide to follow. It will also show you how to structure a sample of the essay in such a way that it will actually help you improve upon your writing.It will also help you know how to make the most of the resources you have found online. There are so many different things you can use to help you in the preparation process. What you need to do is spend some time researching the different resources and see what you can use to help you.A sample of the essay will help you remember the important points that you need to take into consideration. This will give you a chance to ask yourself questions to determine where you should go next. For example, you may want to go over a few sample tok essays with a classmate and compare the features of these samples to the details you wrote about.You need to think of what features you like best in the essay. You may also want to keep in mind what aspects you found interesting and change them from your original idea. Your sample of the essay should allow you to do this easily. There are a number of tools on the Internet that can help you with this.The main thing you need to focus on with this kind of resource is the format of the text. You should be able to get the essay formatted correctly in order to allow you to follow along with the examples. This will provide you with a solid base that you can build upon as you create your own.Using the sample tok that you find will also show you how to structure the essay. You should find that there are a few different ways that you can create the essay. You may find that a sample of the essay is perfect for the assignment you are working on.The advantages of using a sample of the essay are many. One of the most important advantages is that you will be able to determine how well you have prepared for this particular assignment. This may mean that you can continue to do better in your writing.

Grams and Telegrams

Grams and Telegrams Grams and Telegrams Grams and Telegrams By Mark Nichol This post lists and defines words derived from the Greek term gramma, which pertains not only to a small weight, as in gram and compound words in which gram is the base, but also to letters (hence telegram) and writing (hence grammar). Words That Begin with Gram gram: a metric unit of weight equivalent to one one-thousandth of a kilogram, the base unit of weight in the metric system; gram is also an unrelated term for any of various legumes, such as chickpeas, and an informal variant of grandma gramarye (also gramarye): magic, enchantment, or necromancy (likely from the Old French term gramaire, which initially referred to any book written in Latin and came to pertain to a book of grammar or of magic) gramercy: an obsolete construction derived from â€Å"grand mercy,† a Middle English expression of gratitude or surprise based on the Anglo-French phrase grand merci (â€Å"great thanks†) grammar: the study or system of word classes and their inflections, functions, and interrelationships; the application of rules of grammar in speech and writing; a grammar textbook; and, by extension, principles and rules of a particular practice or technique, or a set of such guidelines grammar checker: software that evaluates grammar in writing used in electronic documents grammarian: one knowledgeable about grammar grammatical: pertaining to grammar grammatist: a strict grammar expert grammatolatry: worship of letters and words, especially in the context of devotion to Christian scripture Grammy: one of a number of awards given for excellence in recorded music (derived from gramophone; see gramophone, below); the plural is Grammys gramophile: one who collects or otherwise enjoys phonograph records gramophone: a former trademark for a brand of phonograph, or record player grimoire: a manual for calling demons and spirits (from an alteration in Old French of the word gramaire; see gramarye, above) Words That End with Gram aerogram: an obsolete term for an airmail letter, one specially designated for shipment on an airplane at a time when mail was usually sent by sea anagram: a word or phrase formed by transposing another word or phrase angiogram: an X-ray or gamma ray photograph produced by injecting a substance into blood vessels that is visible in the image cardiogram: a tracing of movements of the heart centigram: a metric unit of weight equivalent to one one-hundredth of a kilogram cryptogram: a message in cipher or code, or a figure or symbol with hidden significance dactylogram: a fingerprint diagram: a drawing, or a chart or plan, that explains or shows parts of an object or an organism; as a verb, to explain or show something with such a representation electroencephalogram: a tracing of brain waves hexagram: a six-pointed star (a similar figure is called Solomon’s seal) histogram: a visual record of frequency of occurrence hologram: a three-dimensional image, or the pattern producing the image derived from a laser beam or similar beam ideogram: a picture or symbol used to represent a thing or an idea rather than a word or phrase; also, a synonym for logogram (see logogram, below) kilogram: the basic unit of weight in the metric system, roughly equivalent to 2.2 pounds lipogram: a piece of writing deliberately written so that a particular letter of the alphabet is never used logogram: a sign such as an ampersand (), or a dollar sign, that represents a word mammogram: a photograph of breasts using X-rays for medical examination, or the procedure for producing a mammogram milligram: a metric unit of weight equivalent to one one-thousandth of a gram monogram: a sign that combines a person’s initials into one symbol pentagram: a five-sided star used as a symbol of magic or the occult phonogram: a character or symbol that represents a sound, syllable, or word pictogram: an ancient drawing or painting on rock, a symbol in a graphic system using pictures, or a representation of data using pictures (also called a pictograph) seismogram: a record, produced by a seismograph, of a tremor spectrogram: a diagram or image of the spectrum of light telegram: a message sent by telegraph tetragrammaton: the four Hebrew letters, usually represented by YHWH (Yahweh) or JHVH (Jehovah), constituting the name of God Gramineous and graminiverous, meaning, respectively â€Å"pertaining to grass† and â€Å"having a diet of grass,† are unrelated. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:When to Capitalize Animal and Plant Names10 Types of TransitionsWhat Is a Doctor?

The effects of the titanic Essay Example | Topics and Well Written Essays - 500 words

The effects of the titanic - Essay Example The Titanic had enough lifeboats for first and second class passengers, but not for steerage. So the poor passengers almost all drowned, while the rich passengers mostly survived. Titanic carried 20 lifeboats, enough for 1178 people. The existing Board of Trade required a passenger ship to provide lifeboat capacity for 1060 people. Titanic's lifeboats were situated on the top deck. The boat was designed to carry 32 lifeboats but this number was reduced to 20 because it was felt that the deck would be too cluttered and thus pose an inconvenience to the first class passengers whom enjoyed strolling the deck. On a luxury ship, lifeboats for everyone would mean less room for games and sports on the upper decks. Passengers would have had to give up play areas for lifeboats (Lord, Lives On 85). White Star line tragically sacrificed safety for luxury. The question remains whether or not first and second class passengers received preference on the lifeboats. The White Star line claims there was no distinction between the three classes of passengers, however, only 25 percent of third class passengers were saved compared to 53 percent of first and second class passengers. The White Star line explained that third class passengers were more reluctant to leave the ship and they did not want to part from their belongings.

Leibniz's Conception of Substance Essay Example | Topics and Well Written Essays - 1250 words

Leibniz's Conception of Substance - Essay Example Such full understand is beyond the grasp of our finite minds, but is not beyond the grasp of God Any object in the universe is connected in some way or another. Every substance is like an entire world and like a mirror of God, or indeed of the whole world which it portrays, each one in its own fashion. Each substance reflects all the others. No substance can really cause any change in any other. What happens to be causal interaction among substances is really a "pre-established harmony" among them, reflecting the fact that God created each one with an eye to all the rest. The identity of indiscernibles - of all the harmoniously evolving substances in the universe, no two are alike in every respect. If any two were completely alike, they would be one substance rather than two. The mere possibility of these other worlds defeats the implication that whatever happens in our world is necessary. Leibniz's view rule out human freedom. God has decreed that "the will shall always seek the apparent good in certain particular respects. He, without at all necessitating our choice, determines it by that which appears most desirable". Whatever we do stems from our own will, and is done in pursuit of our vision of the good. Hence, anything we do is our own responsibility. God inclines our soul without necessitating them. Leibniz was dissatisfied with the way Descartes and Spin... To say, as Descartes did, that there are two independent substances - thought and extension - was to produce the impossible dilemma of trying to explain how those two substances interact as body and mind either in human beings or in God. Spinoza had tried to solve the dilemma by saying that there is only one substance with two knowable attributes, though and extension. But to reduce all reality to a single substance was to lose the distinction between the various elements in nature. To be sure, Spinoza spoke of the world as consisting of many modes in which the attributes of thought and expression appear. Still, Spinoza's monism was a pantheism in which God was everything and everything was [art of everything else. To Leibniz, this conception of substance was inadequate because it blurred the distinctions among God, humans, and nature each of which Leibniz wanted to keep separate. Paradoxically, Leibniz accepted Spinoza's single-substance theory and his mechanical model of the universe. However, he presented such a unique theory of this one substance that he was able to speak of the individuality of persons, the transcendence of God, and the reality of purpose and freedom in the universe. Extension versus Force. Leibniz challenged the fundamental assumption upon which both Descartes and Spinoza had built their theory of substance, namely, extension implies three-dimensional size and shape. Descartes assumed that extension refers to material substance that is extended in space and is not divisible into something more primary. Spinoza, too, considered extension as an irreducible material attribute of God and Nature. Leibniz disagreed. Observing that the bodies or things we see with our senses are divisible into

Dangers of Body Art Essay Example for Free

Dangers of Body Art Essay â€Å"Grandma, what does that thing on your right wrist say? † asked Maya. â€Å"It says Justin Bieber! Who is Justin Bieber? Was that your boyfriend back in the day? † Maya’s grandma simply responded, â€Å"No, this is what you call a big mistake! † Grandma did not tell Maya about her life-threatening encounter with Hepatitis B, how she was judged for tattooing a Canadian singer’s name on her, and how she was not able to keep a steady job. Grandma regrets getting that tattoo. She daydreamed many days how her life could have been better. Can you really blame Grandma? She did this when she was a teenager. The trend in this century has increased. Tattoos are a major fashion statement among teenagers today, but the majority of the young adults fail to consider the medical, social, and professional consequences tattoos can inflict on one’s life which may result in regret. Adolescents have several reasons for having tattoos are numerous but some are senseless. A survey was given to students about the motive for their tattoos: â€Å"Fifty-three percent of the students replied for self expression. Thirty-five percent just wanted one. Twenty-one percent got the art to remember an event. Seventeen wanted to feel unique. Eleven got it to express independence,† (Winkler 18). The reasons are endless. A rebellious tattoo gives one a tougher look, so that one appears disobedient to rules. The indifferent appearance verses the bland look that has been acquired by society for centuries. Well-known actress, Pamela Anderson, feels â€Å"tattoos are symbolic of the most important moments of your life† (Mason 16). Moments of life are similar to rites of passage. On Dictionary. com, a rite of passage is â€Å"Ceremonies that mark important transitional periods in a person’s life . . . † (Keloid). It is common for one to get a tattoo(s) displaying marriage or in memory of another’s death. Anderson also stated about getting a tattoo, â€Å"my sons’ first girlfriend come over and I’m all wrinkled up in a chair with tattoos all sagging down to my ankles† (Mason 16) Everyone sets goals but in cases people have tattooed the goals or something symbolic to the goals on their body. â€Å"Several athletes, for example, have had the Olympic rings tattooed on their bodies to show how much they wanted to compete in the Olympic Games. † (Mason 16). Love is a beautiful thing but would you risk showing it on your skin? It is common for people to tattoo love-one’s name on them. Many say that having a relative’s name is better than having a boyfriend or girlfriend’s name tattooed on one. One’s lover can change constantly but your family is yours officially. For instance, â€Å"Actress Angelina Jolie had actor Billy Bob Thornton’s name tattooed on her arm soon after she married him. By the summer of 2002, the two had split up† (Mason 17). Some professional tattoo artist can remember a story about someone who came in to cover up someone’s name that was tattooed on them. Mr. Barham’s second period class took a survey on having their girlfriend/boyfriend’s name on them. Fifty percent said it was ignorant, twenty-five percent said it was ill-advised, and twenty-five percent said to wait till marriage. (Concluding Sentence? ) Hardship enters in and out of everyone’s life. Hardship can send one into sadness. Sadness is another reason one may have a desire for a tattoo; most likely to remember the event. Actress Alyssa Milano said about getting tattoos out of misery, â€Å"I’ve always gotten them [tattoos] at times when I was sad about something [†¦] relationship problems or the fact that it had rained every day for a month† (Mason 17). It is not advised to get a tattoo during the time of grief. Why do you have that tattoo again? † said Ashley. â€Å"Well, I don’t know† said Jason. Jason received a tattoo no for no particular reason? As said before, thirty-five percent of teens got the tattoo because they just wanted it (Winkler 18). Some say it looked cool or felted good and encouraged them to get more. One can result in a deadly ending if having numerous tattoos or even if you get one for the first time. The risks of having tattoos are endless but the most deadliness one is Hepatitis B or C. Problems, such as infections, tattoo removal, keloid formation, and allergic reaction. There have been many people who have contracted diseases through tattoos, but when society thinks of tattoos, the risks are not recognized. Infections are prone to happen if one does not use sterile equipment to perform the tattooing procedure such as re-using ink or used needles. Infection affects the blood stream and later causes problems if one was to become a blood donor. Tattoos removal may involve scaring of the dermis and numerous treatments. The cost of treatments varies by size and what treatment is being done but either way the treatments are expensive. One consequence tattoo removal results in is keloid development. According to Dictionary. com, a keloid is â€Å"an abnormal proliferation of scar tissue†¦Ã¢â‚¬  (Keloid). If one already develops a keloid(s), getting a tattoo(s) increases the formation. Having an allergic reaction is possible to happen while getting a tattoo and is difficult to control. It is extremely rare for one to be allergic to the products used. Removing the tattoo pigments is the procedure that aids one during an allergic reaction. Neither teenagers nor adults would have thought these risks could infect someone. Usually when people have tattoos, they are judged on spot. In some cases, society does not accept the act of having tattooing due to personal preference which starts social altercations. Views on tattoos can be taken in a negative manner. Doing research, â€Å". . . the average person described the body art as dirty and gross† (Ottawa Expert in French English Language Training; Free Online French English Lessons). Compare the average person to someone fund of tattoos and they could prove them wrong. To others, tattoos are seen as their way to express through art. Pricing for tattoos are outrageous, also. Generally, tattoo parlors range pricing upon a flat fee, hourly fee, or both. A flat fee is the cost based on the artist having to sketch the design, provide colors to the art, and time it took. An hourly fee is a charge based upon the length of time it took to complete the tattoos; common hourly fees range for 50-250 per hour. Prices tend to be extremely high which causes many to go to an unprofessional artist. When getting tattoos, others do not consider society’s opinion or just do not care. There have been cases where parents have kicked out their child because of having tattoos resulting to be homeless. Also, parents have disowned children due to tattoos. Facts stated, â€Å"Over half of the families in Canada would not let their children get tattoos. † (Ottawa Expert in French English Language Training; Free Online French English Lessons). It has been restaurants or stores that do not allow tattooed people to enter the facility. Religious reasons are, also, why people are not able to get tattoos. Roleff reproduced about religions and tattoos, â€Å"Getting a tattoo may give some youths a feeling of power and control over their lives, but the Old Testament forbade tattoos. While today’s Christians are not bound by Old Testament law, tattoos-even temporary ones-suggest paganism and idol worship. Many people react negatively to those with tattoos, which could lead to problems when it is time to find a job or pursue personal relationships. Many people come to regret having a tattoo. It is best not to get one in the first place† (Roleff 68). Generally, views of tattoos by society have been negative. From awful adjectives to religious views, tattoos are frowned upon constantly. Tattoos in the work area have, also, been a problem for years. Today in society some find it acceptable but others still find it hard to get over. Having tattoos while maintaining certain professions, such as a government job, give the society the perspective of how tattoos are viewed. There have been times when a firefighter has been insulted, harassed, or discriminated against for having a tattoo. People in the community find it unprofessional for them to even have the littlest of tattoos. I know it is impossible to believe but teachers have and had lives, also. In the past, there have been problems where a teacher has got a tattoo. Districts have addressed the dress code for teachers, and enforcing them to hide all body art. Teachers chose to comply with the new rules. Some meet the terms to support their family and some wanted to be role models to the students. Schools are not the only place where they have placed a dress code. The official policy is to sport tattoos in certain places, such as a certain spot on the neck. Also, it has to be an appropriate tattoo. According to a section article, â€Å"In 1900 an estimated 90 percent of sailors in the United States Navy were tattooed† (Roleff 82). That was until another policy had been set to prohibit tattoos that were in plain sight. The policies are in place for the professional look from society. According to Dictionary. com, a tattoo is the act or practice of marking the skin with indelible patterns, pictures, legends, etc. , by making punctures in it and inserting pigments (Tattoo). The motivations for having tattoos were endless but true. Teenagers, today, have made tattoos seem acceptable to have, especially having many of them but lack understanding consequences. The medical outcomes to having tattoos are numerous diseases and difficulties. Majority of society’s view tattoos as impure. The prices of tattoos are insane but for a tattooist, them expressing themselves is way more valuable. There have been public places that do not allow people who have tattoos. Religions find it unruly to have tattoos. Then, there is the professional view. Society would not want a tattooed firefighter to represent them because of the unruly look that tattoos are viewed as. Teenagers may love the form of expression but do not take the time to understand. Tattoos can cause death or can hurt one, physical or mentally.