Thursday, January 30, 2020
Advertising Is Harmful Essay Example for Free
Advertising Is Harmful Essay Today I went to the bathroom in Tysonââ¬â¢s mall, and I saw a Lenovo camera advertisement stuck in front of the stool. It made me feels like a camera recorded everything in the bathroom. No matter where you go, walking on the street, taking the bus or subway, looking for websites or watching TV shows you always see advertisements. So I believe advertisements are harmful. Some people say that advertisements wonââ¬â¢t brainwash them, because they know what they really want. I donââ¬â¢t agree with this, because advertisements affect our subconscious mind. For instance, I have read a newspaper article about a mother who came home and asked her child what he wanted to eat and her child said McDonalds. The mother asked him why McDonalds and the kid said because he always saw it on the TV so he wants to try it. See more:à Social Satire in The Adventures of Huckleberry Finn Essay Although a child didnââ¬â¢t really know how McDonald food tastes, McDonalds had been advertised so many times on the TV that the children make the decision to have it for dinner. Not only are kids influenced by advertisements, but adults also are. For example, I bought a Dell laptop last year, but returned it a week later. I saw the Dell advertisements everywhere, at the college, the website, and even walking on the street, so when I wanted to buy a laptop, Dell became my first choice. I returned it a week later, because my friend told me Lenovo laptop has the same configuration as the Dell laptop but the price was much cheaper. This example demonstrates how the advertisement induces people to buy products. When people have seen advertisements many times, they have good impressions of the product in their minds. So not was only I had been influenced by advertisements, but most people are also. For example, most people bought IPhones rather than other phones because IPhones adverti sements around everywhere. Often an advertisement not only disturbs our daily lives, but also provides untrue information. Companies always show perfect products in their advertisements, but the real products are much worse. For example, last month I went to Burger King, and I saw a big poster outside the store that showed a man held a hamburger with two hands and open his mouth as big as he can to eat a hamburger. However, he only bites little of the hamburger, because it was too big. And it only cost 99 cents! When I bought it, I felt I had been cheated. It was delicious, but it was smaller than my hand and can be finish within a bite. Also most of the reducing weight advertisements are untrue too. Some companies exaggerated their products in the advertisement to misleading people to buy the products. Some of the advertisements said the medicines could help people reduce around 5 to 20 pounds per month. As we all know, obesity is one of the most serious problems in America, so many people tried to reduce their weight in many ways. However, the result is not as the advertisements showed. Those drugs helped people reduce the weight but also had side effects. For instance, drugs harm peopleââ¬â¢ health by increasing the risk of diseases, and people would also rebound a weight heavily after they stopped the drug. While not all advertisements are untrue, some advertisements provide exaggerated information that let us waste money and also harm our health. We waste our money to buy advertised products we donââ¬â¢t need. An advertisement may make us feel lower class than other because not having the newest product. For example, The Apple Company has most successful advertisement campaign, because most of people would like to buy their new products. For example, the IPhone5 commercial shows IPhone5 is tallest, thinnest and lightest iPhone. Many people changed Iphone4S to the IPhone5 because the commercial shows IPhone5 is better. However, it has similar systems and the same function as Iphone4S. Another reason people buy the IPhone5 is they had low self- esteem. Like my friend who bought IPhone4S last winter and bought IPhone5 now. And he told me, when there has a better product then he wouldnââ¬â¢t use worse one, because that makes him feel he was lower class than others. In this case, people wasted money to buy the newest advertised products to satisfy their vanity. There are too many advertisements in our world now, because companies try to increasing the sales. However advertisements always mislead people to waste money. Government must provide a law to stop untrue and exaggerated advertisements. And parents also need to take time to explain to their child that some products they saw in commercial are harmful. For example, when child asked to buy a quick food or candies, parents must explain to them those foods are unhealthy.
Wednesday, January 22, 2020
Comparing Dubliners and To the Lighthouse Essay -- comparison compare
Comparing Dubliners and To the Lighthouse In Dubliners and To the Lighthouse, James Joyce and Virginia Woolf explore the depressing results of lives devoid of growth or meaning versus those who dare to live their lives in spite of all strife and adversity. Joyce and Woolf are both concerned with the meaninglessness of stagnant lives, the first operating in pre-WWI Ireland, the second in England during and after the war. "The Dead" and To the Lighthouse both reveal the despair of lives that occupy but do not fill the short span of time between birth and inevitable death. With "The Dead", Joyce brings his lament for Ireland's plight to its depressing yet strangely peaceful conclusion. Like all the previous stories in Dubliners, "The Dead" gives the reader a heavy dose of the social depravity of an Ireland torn by internal war. Everyone in the story seems so caught up in remembering the faded glory of the past that the living have become even more stagnant and perished than the dead themselves. Aunt Julia appears first as a faded flower: "her hair...was grey; and grey also, with darker shadows, was her large flaccid face. ...[She had] the appearance of a woman who did not know where she was or where she was going" (187-188). Even this initial description seems to be of one near or even past death. Even while singing more beautifully than she ever had (202-203), she seems more prepared for her funeral than "Arrayed for the Bridal". She has both authored and, for every Christmas party she has ever thrown, performed this song about a wedding, and yet has never herself married or produced children. Her life, though intermittently beautiful while it has lasted, will soon end in obscurity, fruitless, childless, "wasted", as her ... ...ort of lasting meaning. What the lamented heroes of old had, and the zombie-like characters of the present generally lack, is the knowledge that the formation and maintenance of emotional bonds between human beings are the only meaningful enterprise of the human spirit and the only worthwhile endeavor of the human life. Both authors make it clear that those who spend their lives going through the motions of an unemotional society waste their lives as slowly and painfully as their bodies waste away. For them, the only way to truly live one's life is to follow the feeling, the passion of the soul. Works Cited: Benstock, Bernard. Critical Essays on James Joyce. G.K. Hall & Co. Boston, Massachusetts: 1985. Joyce, James. Dubliners. New York: Washington Square Press, 1998. Woolf, Virginia. To the Lighthouse. New York: Harcourt, Brace, Jovanovich, 1989.
Monday, January 13, 2020
Department of Marketing, Tourism and Hospitality Essay
1. Introduction and welcome Marketing is part of all of our lives and touches us in some way every day. It is also a key factor in business success and is increasingly used by organisations in a wide range of sectors. The unit begins with an examination of the marketing concept and marketing theory. It goes on to consider the various issues that marketers face in marketing decision making and the concepts and theories that can help. The unit helps you to understand the challenges of marketing management in manufacturing and service industries: analysing marketing environments; evaluating strategic alternatives and designing marketing programmes involving decisions about products/services and important concepts of the services marketing theory. The focus in this unit therefore is on the theory and practice of marketing in the context of organisations. On completion of the unit you will have gained understanding of the decisions that face marketers in a complex and dynamic environment and the concepts and theories that can be used to inform these decisions. This handbook outlines the content and key features of the unit. We hope you enjoy this unit and find the variety of tasks and assessments both interesting and challenging. The unit essentially continues the theme of integration by providing the necessary marketing input into the Applied Integrated Business core unit. Accordingly, the subject content will serve to reinforce and contextualise the learning within that unit. The focus will be on an interactive and active learning environment to engage students in learning activities throughout the sessions. This handbook should be your first point of reference. It outlines everything you will need to know about how this unit is structured, the assessments and the reading that is required. Please take some time to read it carefully. This handbook will help you progress smoothly and enjoyably through this unit. You will also find a regularly updated source of information and an electronic copy of this handbook in the unit website on Blackboard BREO. The address is: http://breo.beds.ac.uk (no www required) 2.Unit leader and team details Unit Leader Ioannis Kostopoulos Ioannis Kostopoulos is a Lecturer in the Department of Marketing Tourism and Hospitality at University of Bedfordshire. His research interests are in services marketing, internal marketing and market research. During his consulting work he has worked with many large organizations in the hospitality, telecommunications and sportsââ¬â¢ industry. He holds a PhD in Services Marketing, a masterââ¬â¢s degree in Marketing and Communications and a bachelorââ¬â¢s degree in Statistics. Email: ioannis.kostopoulos@beds.ac.uk Office hours: Wednesday 10-11 am and Thursday 12- 13 pm Office: To be arranged (Students will be informed through BREO) Telephone Number: To be arranged (Students will be informed through BREO) Other Lecturers Tony Pyne Tony Pyne, now semi retired, has taught marketing at the University of Bedfordshire for 20 years. His research interests are in not for profit marketing and services marketing. Prior to becoming an academic he was the marketing director of a small international market research agency specialising in high tech products and before that its operations director. He has a masterââ¬â¢s degree in marketing, a PGCE and is a graduate chemist Email: ioannis.kostopoulos@beds.ac.uk Office hours: Fridayââ¬â¢s 10am -2pm Office: JM02 Telephone Number: 3457 Field Administrator Sally Mayne Vicarage Street (H Block). Email: Sally.mayne@beds.ac.uk 3. Aims and learning outcomes 3.1 Unit aims The focus in this unit is on the theory and practice of marketing in the context of organisations. On completion of the unit you will have gained understanding of the decisions that face marketers in a complex and dynamic environment and the concepts and theories that can be used to inform these decisions. 3.2 Learning Outcomes | On completion of this unit you should be able to:| To achieve the learning outcome you must demonstrate the ability to:| LO1| Understand the nature, scope and role of marketing in organisations| Describe and apply the basic marketing tools and concepts and articulate the role of marketing in a variety of organizations| LO2| Be able to identify and discuss the key issues that marketers face as they make decisions| Critically review published work on a range of marketing issues| LO3| Understand and discuss the key concepts and theories that inform marketing decisions| Propose well researched and theoretically underpinned solutions to marketing problems | LO4| Identify and analyse marketing problems and plan appropriate courses of action| Be able to formulate plans for marketing activities, including appropriate marketing mix policies and be able to defend and justify proposals for marketing plans and actions.| L05| Apply marketing theory in different organisational contexts| Be able to formulate plans for marketing activities, including appropriate marketing mix policies and be able to defend and justify proposals for marketing plans and actions.| LO6| To express ideas and findings and proposals both verbally and in writing| Write coherently on the subject with accurate referencing, spelling, punctuation and grammar and make clear, timely and well structured presentations.| 4. Approach to learning * Unit delivery will use a combination of lectures and seminars, with the emphasis in seminars being on discussion and debate providing students with an opportunity to relate theoretical content to real-life practical situations. The one hour lecture aims to provide students with useful elements from the pertinent theory and increase their theoretical knowledge and technical skills. Practical seminar activities will be used where appropriate (for example video material, case studies, role play) and students will be encouraged to work individually and in groups to develop a thorough appreciation of the many issues examined. The use of small groups to prepare and present case studies in workshops will aim to provide further experience of working collaboratively, the opportunity to manage a problem-solving group, and the ability to present material clearly and concisely. The primary objective of the presentation is to further develop the ability to present complex ideas orally in a clear, coherent and concise fashion. There will also be a need to defend the ideas in the subsequent group discussion. The presentation topics, which are an integral part of the module, are designed to enhance and deepen understanding of the subject material. * * Attendance and participating in classes Studying at the University of Bedfordshire is not just about subject knowledge. We are also concerned to help you develop your wider attributes and skills. To do this you will need to attend and actively engage in the range of learning activities the course provides. Because attendance is fundamental to your development we do expect you to attend. We will monitor your attendance and contact you if it gives cause for concern. The Division operates a strict non-attendance policy which is available to view on BREO. You can help us by notifying us of any factors that affect your ability to attend. If you are absent from your studies through illness then itââ¬â¢s important that you let us know. You should contact the unit leader or the Field Administrator, Sally Mayne at sally.mayne@beds.ac.uk. If your absence is likely to affect your ability to complete your studies or submit assignments then you can apply for an extension or deferral through the Student Engagement and Mitigating Circumstances Teams. If you feel that your problems are serious enough to be considered for Mitigating Circumstances you will need to apply before the deadline by filling in a Mitigating Circumstances form. Forms can be printed from SiD online or a hard copy can be collected the Student Information Desk (SiD). A decision will normally be available to you within 48 hours of receipt of the claim form and evidence. Progress of the application can be checked by accessing SiD online or by visiting the Student Information Desk (SiD). They can be contacted at sid@beds.ac.uk or by telephoning 0300 300 0042. 5. Assessment brief 5.1 Assessment Overview No| Assessment method | Description of assessment methods| Weight (%)| Submission date | Form of feedback| 1| GroupAssignment| Group Presentation with Report| 30%| 7th December 2013| Summative & Formative| 2| IndividualAssignment| Progress Portfolio| 30%| 22nd March 2013| Summative & Formative| 3| UnseenExams| End of Unit Examination (2 hours)| 40%| End of Unit| Summative| 5.2 Group Assignment You are asked to form groups of 5-6 persons. Then you should visit a store(s) of a chosen international chain of coffee shops (e.g. Starbucks, Costa Cafe) or fast food restaurants (e.g. McDonalds, KFC ), observe and make notes regarding the following: * Storeââ¬â¢s Service capes * Service delivery process * Customers and employeesââ¬â¢ reactions during the service encounter * Service quality You may use photographs to support your discussions. However, please ensure that you ask permission from the store manager before doing so. Then you should prepare and hand in an audio visual podcast presentation and a written report that should contain the following: ââ¬â Presentation Your presentation is to be in the form of an audio visual podcast submitted via DVD, memory stick e.t.c. There will not be an in-class presentation. The presentation should be no longer than 10 minutes and it is a presentation to a formal business committee. In this presentation you will point out any fail points or points that need improvement, in the delivery of the provided service in the store and suggest ways in which the store can upgrade the level of quality of the service provided to customers without significantly increasing the cost of the service delivery. ââ¬â Written Report For your report you should use your notes from the store observation, general information you will collect on the international chain of your choice as well as material from the pertinent literature and include in your report the following: * A blueprint of the provided service * An evaluation of the storeââ¬â¢s physical evidence and the degree to which they are aligned with the companyââ¬â¢s general profile * An evaluation of the degree to which the specific chain is market oriented Format for submission ââ¬â Presentation The length of the presentation should not be longer than 10 minutes The presentation is to be in the form of an audio visual podcast submitted via DVD, memory stick or Utube, i.e. there will not be an in-class presentation. ââ¬â Written Report * The word limit for is 2000 words. * All work should be word processed using either Times New Roman or Arial font, Arial 12 point; 1.5 line spacing; single side A4 paper with numbered pages with line spacing of 1à ½ and justified. * Left hand margin of 3cm; Right hand margin 2 cm; Header 2.5 cm and Footer 2 cm * A bibliography and referencing (where applicable) is essential * Harvard system of referencing * A minimum of 10 referenced academic sources is required. * No more than 50% of references may be from the internet. Extent of collaboration allowed: All members of the group should contribute equally to the research and preparation of the report. Average peer grade: All individuals will receive a mean average peer grade (out of 16), based upon a detailed diary addendum completed by all group members, confirming individual weekly contributions and responsibilities toward the completed report. Full group names and accompanying averaged grades should be clearly presented. The tutor reserves the right to adjust any grade if upon evidence &/or investigation any student is deemed to have failed to effectively contribute. Failure to include diary and peer grades will result in the loss of the 25% overall peer grade. Marking Criteria Excellent work, 16 ââ¬â 14 points *An analysis which deals fully with the major elements from a services marketing point of view *Selection and amplification of ideas which accord with the analysis presented . *Work which shows very good grasp of the concepts in services marketing *Effective use of formatting and layout *An excellent and cohesive report. Above average work, 11 ââ¬â 13 points *A report which is attractive in appearance which addresses the key issues of the assignment competently and creates a positive overall impression *An analysis which deals competently with most of the assignmentââ¬â¢s tasks. *A reasonable choice of ideas which in aggregate show the students understanding of the major elements of the assignment. *Answers which are appropriate and show a good awareness of the services marketing concepts and principles which relate to the assignment areas. *Good use made of formatting and layout. *A good cohesive report. Average work, 8 ââ¬â 10 points *An analysis, which deals with most areas in a manner which, is correct. * A report which is in the main appropriate and shows a good awareness of the services marketing concepts and principles and which relate to the key areas designated in the assignment *Reasonable use of formatting and layout *A cohesive report. Below average work, 5 ââ¬â 7 points *A report which would be considered very poor in a commercial or industrial context and which do not allow the assessor to identify most of the achievement of specified tasks. *An erroneous or substantially incomplete analysis from a services marketing point of view *Answers which show poor understanding of the concepts in question. 5.3 Individual Assignment Picton and Broderick define integrated marketing communications as A process which involves the management and organisation of all agents in the analysis, planning, implementation and control of all marketing communications contacts, media, messages and promotional tools focussed at selected target audiences in such a way as to derive the greatest economy, efficiency, effectiveness and coherence of marketing communications effort. Select a large service organisation (e.g. Bank, Airline Company, Telecommunications Company, Hotel) that advertises heavily in many media and by way of a portfolio show how it makes use of the integrated marketing communications concept. You will need to collect your examples over a period of several weeks. If you leave it to the day before it is due in you will inevitably receive a failing grade. This is an individual assignment and I would expect 1500 words plus several examples which may include your notes on what you observe on a store visit. Format for submission Written Report * The word limit for is 1500 words. * All work should be word processed using either Times New Roman or Arial font, Arial 12 point; 1.5 line spacing; single side A4 paper with numbered pages with line spacing of 1à ½ and justified. * Left hand margin of 3cm; Right hand margin 2 cm; Header 2.5 cm and Footer 2 cm * A bibliography and referencing (where applicable) is essential * Harvard system of referencing * A minimum of 10 referenced academic sources is required. * No more than 50% of references may be from the internet. Details for the assessments will be supplied as separate documents throughout the unit. They will also be available on BREO. Please read the assessment instructions very carefully. 5.4 Submission details ââ¬â Plagiarism You should hand in assignments through the Assignment Hand in point, located outside the LRC in Park Square next to the Book Return point. For LRC opening times please see http://lrweb.beds.ac.uk/. You can deposit your assignments at any time throughout the opening times of the University building. Although you will be able to submit your piece of work until 8am the next day and it will be accepted as on time, for example: if an assignment is due in on Monday 19 April it can be submitted up to 7.59am Tuesday 20 April, this is NOT recommended and you should submit your assignment by 4pm on the published due date. You will need to print your own top cover sheets from eVision (these carry the details of the unit and assessment on the front). Attach the top sheet to the assignment securely and then collect a barcode label from the dispenser located at the Security Desk next to the LRC. Follow the instructions on the Assignment Hand in point display to submit the assignment. Collect the receipt which indicates that a piece of work has been handed in. A receipt confirming the unit, assessment and time of submission for the assignment will be sent to your email account. Receipts must be retained as proof that the work has been submitted. You must also submit a copy of your assignment through TURNITIN via BREO. It will graded as a non-submission if written work is not submitted on time through TURNITIN. Coursework must be handed in by the date and time specified in your student handbooks or on BREO. Late work is not accepted, and will be deemed a fail and graded G(0) (no work submitted). Written work must be legible and comprehensible, work may be rejected work which does not meet reasonable standards of presentation, and this may result in you failing or being referred. Written work must be presented in English. Extenuating Circumstances If you believe that you are likely to miss a deadline because of extenuating circumstances (for example illness), you should apply to apply for an extension through the Student Engagement and Mitigating Circumstances Teams via SID. Your application should be accompanied by documentary evidence of your extenuating circumstances. Individual tutors are not able to extend published deadlines. Plagiarism Plagiarism takes the form of repeating another personââ¬â¢s words or images and claiming them as your own, or presenting someone elseââ¬â¢s line of thinking as if it was your own. To plagiarise is to give the impression that you have written or designed or thought something that you have in fact borrowed from someone else. You can use other peopleââ¬â¢s ideas, words and images, but itââ¬â¢s important that you acknowledge them through appropriate referencing. Remember that your examiners are wanting to assess your ability, not those of others, so itââ¬â¢s important that you also interpret othersââ¬â¢ work and that there is sufficient of your own work in your assignments that your ability can be assessed. You should keep a careful record of all the sources you use, including all internet material and ensure that you understand correct referencing practices. These are outlined the course handbook and online at: http://lrweb.beds.ac.uk/guides/resources/referencing You are also not permitted to re-present any assessment already submitted for one unit as if for the first time in another unit. Double counting of assessed work is not normally allowed. If submitting work previously included in another assessment then you should attribute the section of text from the earlier work so that it can be taken into account by the examiners. Plagiarism Detection Service To help address plagiarism and protect your award, please also ensure you submit a copy your written work electronically through ââ¬ËTurnitinââ¬â¢ via BREO. We may also submit your assignment to the UK universitiesââ¬â¢ JISC Plagiarism Detection Service. Working together Discussing ideas with your fellow students is part of learning and we would encourage you to do this and to exchange interesting and relevant sources and references. However, there is a distinction between sharing ideas and collusion which is an academic offence. You must not work with others to the extent of exchanging written materials you have prepared, such as notes or drafts of assignments unless you have been expressly told that this is permissible. If these types of materials are shared this will be regarded as an assessment offence for the person who lends the material as well as for the person who uses it. Your own work should be regarded as your own property and you should protect it. If you are working in a shared space, log off from the computer you are working on whenever you take a break so that others cannot access or copy your own work; take care to destroy printed drafts or copies of work, rather than just discarding them; and, donââ¬â¢t give your work to others in any format. If you are working on a group assignment make sure you understand the allocation of responsibilities between yourself and the other members of the group. 5.5 Feedback Assessment will be provided individually to students, through group feedback (where relevant) and on your individual student BREO site. There are also opportunities for formative feedback on your work throughout the unit which will help you complete your final assignments. Marked work will be available for collection from the tutor three weeks after the assessment deadline. 6. Teaching and reading schedule You can check your timetable at: http://timetable.beds.ac.uk then follow the links under ââ¬Ëunitsââ¬â¢. If there are changes to the timetable, you will be notified on the BREO site for this unit. Please check it regularly. *Further reading suggestions will be provided to students in a weekly basis through BREO. Further reading includes academic articles, book chapters and case studies. 7. Reading and resources The majority of directed readings will be in the form of books, published conference papers, and case study materials. You will be advised of essential reading relating to each topic covered and directed towards the most relevant textbooks and articles for these subjects. This guidance will be communicated by tutors and via BREO. In addition, you are encouraged to access journal articles via electronic databases and encouraged to search for appropriate examples of relevant research. You are strongly encouraged to access information electronically but to exercise critical judgement when identifying useful sources. The Learning Resources Centre at Park Square houses our main tourism collection. Here you can expect to find copies of essential texts on your reading lists as well as supplementary reading. Many of our resources are in electronic format and can be accessed off-campus. Extensive reading is essential and it is important you reference this work accurately and correctly. Please make you sure you read and follow the guide to referencing found at: http://lrweb.beds.ac.uk/guides/resources/referencing Subject ââ¬âspecific library guides are available in printed format in the Learning Resource Centre and on the Learning Resources web site http://lrweb.beds.ac.uk/guides/subjectguides. Go to Advice and Help, then Subject Guides. These guides tell you which resources are important for your particular course. The Subject Librarian is Bill Mortimer who can be contacted by e-mail bill.mortimer@beds.ac.uk or by phone 01234 351671, ext.4374. Bill is based in the Polhill campus, Room: R1.01. If you want to call him free of charge, thatââ¬â¢s possible from the LRC. Essential reading Brassington, F and Pettitt,S (2006) Principles of Marketing, Fourth Edition, Prentice Hall, NJ. ISBN 0-273-69559-2. Recommended reading Christopher H. Lovelock, Jochen Wirtz, Patricia Chew (2009), Essentials of Services Marketing First Edition, Prentice Hall ISBN-13 978-981-06-7995-8 Kotler, P., Wong, V., Saunders, J. and Armstrong, G. (2005) Principles of Marketing: 4th European Edition, Prentice Hall International/Pearson Education Limited. ISBN: 0273 68456 6 Groucutt, J, Leadley P, Forsyth P (2004) Marketing: essential, principles, new realities First Edition, Kogan Page ISBN 0-7494-4114-3
Sunday, January 5, 2020
B Lymphocytes Humoral Immunity And Provides Defense...
Introduction : B lymphocytes are the effectors of humoral immunity and provides defense against pathogens by producing antibody. B cells constitute approximately 15% of peripheral blood leukocytes and arise from progenitors and precursors in the bone marrow. B lymphocytes undergo random immunoglobulin variable gene rearrangements at the heavy and light chain loci. These chains pair with the Igà ± and Igà ² polypeptides to form the mature B-cell receptor which is then transported onto the cell surface where it can bind antigen and signal inside the cell. Different populations of B cells result in pre immune pools where each cell in these quiescent populations expresses a B cell antigen receptor with a unique specificity. The BCRs come in contact with their specific antigen and generate several intracellular signals are which leads activation, differentiation, and formation of plasma cells and memory B cells. This process mediates the response to subsequent antigen challenges. B lymphocytes play an essential role by not only producing antibodies but also functioning as antigen-presenting cells and certain B cells can also negatively regulate the immune response by producing regulatory cytokines and directly interacting with pathogenic T cells via cell to cell contact. Newly generated immature B cells are selected to enter the peripheral mature B-cell pool only if they do not bind to self-antigen. Immature B cells that bind to self antigen are not generally recruited to matureShow MoreRelatedThe Main Functions Of The Immune System907 Words à |à 4 PagesDefending the host against pathogens and toxins is the major function of the immune system, a task essential to any organism. Composed primarily of individual cells rather than forming into organs, the cells of the immune system spread throughout the body. The immune system is able to distinguish its own molecules from foreign molecules. 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B cells constitute approximately 15% of peripheral blood leukocytes and arise from progenitors and precursors in the bone marrow. B lymphocytes undergo random immunoglobulin variable gene rearrangements at the heavy and light chain loci. These chains pair with the Igà ± and Igà ² polypeptides to form the mature B-cell receptor which
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