{"id":210226,"date":"2025-04-30T06:54:00","date_gmt":"2025-04-30T06:54:00","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=210226"},"modified":"2025-04-30T06:54:03","modified_gmt":"2025-04-30T06:54:03","slug":"the-ability-of-the-immune-system-to-recognize-self-antigens-versus-nonself-antigen-is-an-example-of","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/30\/the-ability-of-the-immune-system-to-recognize-self-antigens-versus-nonself-antigen-is-an-example-of\/","title":{"rendered":"The ability of the immune system to recognize self antigens versus nonself antigen is an example of"},"content":{"rendered":"\n<p>The ability of the immune system to recognize self antigens versus nonself antigen is an example of:<\/p>\n\n\n\n<p>a. Specific immunity<br>b. Tolerance<br>c. Cell mediated immunity<br>d. Antigenic immunity<br>e. Humoral immunity<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct answer: b. Tolerance<\/strong><\/p>\n\n\n\n<p><strong>Explanation (300 words):<\/strong><\/p>\n\n\n\n<p>The immune system has the vital function of distinguishing between &#8220;self&#8221; and &#8220;nonself&#8221; antigens. This ability is fundamental to preventing the immune system from attacking the body\u2019s own cells and tissues\u2014a concept known as <strong>immunological tolerance<\/strong>.<\/p>\n\n\n\n<p><strong>Tolerance<\/strong> refers to the immune system\u2019s capacity to recognize self-antigens (molecules native to the body) and not mount an immune response against them. This process begins during early development in the thymus and bone marrow\u2014sites of T cell and B cell maturation, respectively. In the <strong>central tolerance<\/strong> mechanism, developing lymphocytes that strongly react to self-antigens are deleted or inactivated through processes such as clonal deletion (apoptosis) or receptor editing (especially in B cells).<\/p>\n\n\n\n<p>If any self-reactive immune cells escape into the periphery, <strong>peripheral tolerance<\/strong> mechanisms like anergy (functional inactivation), suppression by regulatory T cells, or activation-induced cell death help prevent autoimmunity. These checks are crucial, because a failure in tolerance can lead to <strong>autoimmune diseases<\/strong>, such as type 1 diabetes, lupus, or rheumatoid arthritis.<\/p>\n\n\n\n<p>The other answer choices, while related to immune function, do not directly describe the mechanism of self\/nonself recognition:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a. Specific immunity<\/strong> involves immune responses tailored to specific pathogens but doesn\u2019t focus on distinguishing self from nonself.<\/li>\n\n\n\n<li><strong>c. Cell-mediated immunity<\/strong> involves T cells targeting infected or abnormal cells but relies on prior recognition of nonself.<\/li>\n\n\n\n<li><strong>d. Antigenic immunity<\/strong> is not a standard immunology term and is not relevant here.<\/li>\n\n\n\n<li><strong>e. Humoral immunity<\/strong> involves B cells and antibodies targeting pathogens, also requiring tolerance but not defining it.<\/li>\n<\/ul>\n\n\n\n<p>In summary, <strong>tolerance<\/strong> is the specific immunological mechanism that enables the immune system to distinguish self from nonself antigens, helping prevent autoimmune reactions and maintain immune homeostasis.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ability of the immune system to recognize self antigens versus nonself antigen is an example of: a. Specific immunityb. Tolerancec. Cell mediated immunityd. Antigenic immunitye. Humoral immunity The correct answer and explanation is : Correct answer: b. Tolerance Explanation (300 words): The immune system has the vital function of distinguishing between &#8220;self&#8221; and &#8220;nonself&#8221; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-210226","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=210226"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210226\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=210226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=210226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=210226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}