{"id":202371,"date":"2025-03-17T12:34:24","date_gmt":"2025-03-17T12:34:24","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=202371"},"modified":"2025-03-17T12:34:26","modified_gmt":"2025-03-17T12:34:26","slug":"parietal-cells-of-the-stomach-produce-__","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/17\/parietal-cells-of-the-stomach-produce-__\/","title":{"rendered":"Parietal cells of the stomach produce __"},"content":{"rendered":"\n<p>Parietal cells of the stomach produce <strong><em>__<\/em><\/strong>.<\/p>\n\n\n\n<p> A) mucin<\/p>\n\n\n\n<p> B) pepsinogen<\/p>\n\n\n\n<p> C) hydrochloric acid <\/p>\n\n\n\n<p>D) rennin<\/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>The correct answer is <strong>C) hydrochloric acid<\/strong>.<\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>Parietal cells, also known as oxyntic cells, are specialized epithelial cells found in the lining of the stomach. These cells are primarily responsible for producing <strong>hydrochloric acid (HCl)<\/strong>, which is a key component of gastric juice. HCl plays several critical roles in the digestive process, including:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Acidic environment for enzyme activity<\/strong>: The hydrochloric acid creates a highly acidic environment in the stomach (with a pH of around 1.5 to 3.5). This acidity is essential for the optimal activation and function of pepsinogen (secreted by chief cells) into its active form, <strong>pepsin<\/strong>, which is responsible for breaking down proteins into smaller peptides.<\/li>\n\n\n\n<li><strong>Defense against pathogens<\/strong>: The acidic environment also acts as a defense mechanism, killing harmful microorganisms that may be ingested with food, thus preventing infections.<\/li>\n\n\n\n<li><strong>Denaturation of proteins<\/strong>: The acid helps denature proteins in food, unraveling their complex structures and making them more accessible for enzymatic digestion by pepsin.<\/li>\n\n\n\n<li><strong>Stimulation of digestion<\/strong>: The presence of HCl also activates the enzyme <strong>rennin<\/strong> (chymosin), which is involved in the coagulation of milk proteins in infants.<\/li>\n<\/ol>\n\n\n\n<p>In addition to hydrochloric acid, the parietal cells secrete intrinsic factor, a glycoprotein necessary for the absorption of vitamin B12 in the small intestine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Other options:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A) Mucin<\/strong>: Mucin is produced by goblet cells in the stomach lining and serves to protect the stomach lining from the harsh acidic environment. It is not produced by parietal cells.<\/li>\n\n\n\n<li><strong>B) Pepsinogen<\/strong>: Pepsinogen is produced by chief cells, not parietal cells. It is the inactive precursor of pepsin.<\/li>\n\n\n\n<li><strong>D) Rennin<\/strong>: Rennin (also called chymosin) is primarily produced in the stomachs of infants and is involved in curdling milk, but it is not secreted by parietal cells.<\/li>\n<\/ul>\n\n\n\n<p>Thus, parietal cells are crucial for maintaining the acidic environment necessary for digestion and protection.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parietal cells of the stomach produce __. A) mucin B) pepsinogen C) hydrochloric acid D) rennin The correct answer and explanation is : The correct answer is C) hydrochloric acid. Explanation: Parietal cells, also known as oxyntic cells, are specialized epithelial cells found in the lining of the stomach. These cells are primarily responsible for [&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-202371","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/202371","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=202371"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/202371\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=202371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=202371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=202371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}