All of the following are categories of lymphocytes except:<\/p>\n\n\n\n
A. B cells<\/p>\n\n\n\n
B. Q cells<\/p>\n\n\n\n
C. T cells<\/p>\n\n\n\n
D. NK cells<\/p>\n\n\n\n
The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is B. Q cells<\/strong>.<\/p>\n\n\n\n Lymphocytes are a type of white blood cell that plays a crucial role in the immune system. There are several categories of lymphocytes, but Q cells<\/strong> do not exist in the scientific understanding of immune system cells. Let’s break down the correct lymphocyte categories and explain why Q cells<\/strong> is the incorrect choice:<\/p>\n\n\n\n In summary, B, T, and NK cells<\/strong> are well-defined categories of lymphocytes, each playing a distinct and critical role in the immune response. Q cells<\/strong>, on the other hand, is a non-existent term in this context, making B<\/strong> the correct answer.<\/p>\n","protected":false},"excerpt":{"rendered":" All of the following are categories of lymphocytes except: A. B cells B. Q cells C. T cells D. NK cells The correct answer and explanation is : The correct answer is B. Q cells. Explanation: Lymphocytes are a type of white blood cell that plays a crucial role in the immune system. There are […]<\/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-207708","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207708","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=207708"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207708\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=207708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=207708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=207708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
\n
B cells, or B lymphocytes<\/strong>, are responsible for humoral immunity. They mature in the bone marrow and play a crucial role in the production of antibodies. When exposed to an antigen (a foreign substance), B cells differentiate into plasma cells that secrete antibodies. These antibodies bind to the antigen, marking it for destruction or neutralization by other immune cells. Some B cells become memory cells, which can quickly respond to future infections by the same pathogen.<\/li>\n\n\n\n
T cells, or T lymphocytes<\/strong>, are responsible for cell-mediated immunity. They mature in the thymus and are essential in identifying and destroying infected cells, cancer cells, and foreign cells. There are several types of T cells, including Helper T cells<\/strong> (which aid other immune cells in their function) and Cytotoxic T cells<\/strong> (which kill infected or cancerous cells). T cells are essential in controlling the immune response and maintaining the balance of the immune system.<\/li>\n\n\n\n
NK cells<\/strong>, or Natural Killer cells<\/strong>, are a part of the innate immune system. They are specialized in identifying and destroying virus-infected cells and tumor cells. Unlike B and T cells, NK cells do not require prior exposure to a pathogen to be activated. They recognize stressed or abnormal cells and induce apoptosis (programmed cell death) to prevent the spread of infections or cancer.<\/li>\n\n\n\n
The term Q cells<\/strong> does not correspond to any known category of lymphocytes. There is no established immunological category or function for “Q cells” in the scientific literature, making this option incorrect.<\/li>\n<\/ol>\n\n\n\n