{"id":210228,"date":"2025-04-30T06:55:32","date_gmt":"2025-04-30T06:55:32","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=210228"},"modified":"2025-04-30T06:55:34","modified_gmt":"2025-04-30T06:55:34","slug":"cell-mediated-immunity-is-carried-out-by","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/30\/cell-mediated-immunity-is-carried-out-by\/","title":{"rendered":"Cell mediated immunity is carried out by"},"content":{"rendered":"\n<p>Cell mediated immunity is carried out by\u2026\u2026\u2026\u2026.. while humoral immunity is mainly carried out by\u2026\u2026\u2026\u2026\u2026\u2026..<\/p>\n\n\n\n<p>a. B cells\/T cells<br>b. Epitopes\/Antigens<br>c. T cells\/B cells<br>d. Antibodies\/Antigens<br>e. Antibodies\/Phagocytes<\/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: c. T cells\/B cells<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>The immune system protects the body against pathogens using two main strategies: <strong>cell-mediated immunity<\/strong> and <strong>humoral immunity<\/strong>. These are the two branches of the <strong>adaptive immune response<\/strong>, each involving different types of lymphocytes (white blood cells).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Cell-Mediated Immunity<\/strong><\/h3>\n\n\n\n<p>Cell-mediated immunity is primarily carried out by <strong>T cells<\/strong> (T lymphocytes). These cells are produced in the bone marrow but mature in the <strong>thymus<\/strong>, hence the name &#8220;T&#8221; cells. This form of immunity does not rely on antibodies but rather involves direct action by T cells to combat infected or abnormal cells.<\/p>\n\n\n\n<p>There are several types of T cells:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cytotoxic T cells (CD8\u207a)<\/strong> destroy virus-infected cells, tumor cells, and damaged cells.<\/li>\n\n\n\n<li><strong>Helper T cells (CD4\u207a)<\/strong> assist other immune cells by releasing cytokines that enhance the immune response.<\/li>\n\n\n\n<li><strong>Regulatory T cells<\/strong> help maintain tolerance and prevent autoimmune responses.<\/li>\n<\/ul>\n\n\n\n<p>This type of immunity is especially important in <strong>fighting intracellular pathogens<\/strong>, such as viruses, some bacteria, and in destroying cancerous or transplanted cells.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Humoral Immunity<\/strong><\/h3>\n\n\n\n<p>Humoral immunity is mediated by <strong>B cells<\/strong> (B lymphocytes), which are produced and mature in the <strong>bone marrow<\/strong>. When B cells encounter an antigen, they can differentiate into <strong>plasma cells<\/strong> that secrete <strong>antibodies<\/strong> (also called immunoglobulins).<\/p>\n\n\n\n<p>Antibodies circulate in body fluids (&#8220;humors&#8221; like blood and lymph), binding specifically to antigens on pathogens to neutralize them or mark them for destruction by other immune cells. This pathway is crucial for defending against <strong>extracellular pathogens<\/strong>, such as bacteria and viruses that are not inside host cells.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>In summary, <strong>T cells<\/strong> are central to <strong>cell-mediated immunity<\/strong>, dealing with infected or altered host cells, while <strong>B cells<\/strong> are essential for <strong>humoral immunity<\/strong>, producing antibodies to neutralize pathogens in body fluids.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cell mediated immunity is carried out by\u2026\u2026\u2026\u2026.. while humoral immunity is mainly carried out by\u2026\u2026\u2026\u2026\u2026\u2026.. a. B cells\/T cellsb. Epitopes\/Antigensc. T cells\/B cellsd. Antibodies\/Antigense. Antibodies\/Phagocytes The correct answer and explanation is : Correct Answer: c. T cells\/B cells Explanation: The immune system protects the body against pathogens using two main strategies: cell-mediated immunity and humoral [&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-210228","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210228","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=210228"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210228\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=210228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=210228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=210228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}