The correct answer is D) duodenum<\/strong>.<\/p>\n\n\n\n The duodenum<\/strong> is the first section of the small intestine, immediately following the stomach. It plays a critical role in digestion by receiving partially digested food (chyme) from the stomach and mixing it with digestive enzymes and bile.<\/p>\n\n\n\n The duodenum is a C-shaped, approximately 25\u201330 cm (10\u201312 inches) long structure that curves around the head of the pancreas. It is the shortest but most crucial segment of the small intestine.<\/p>\n\n\n\n The duodenum serves as a primary site for chemical digestion<\/strong>. It receives:<\/p>\n\n\n\n Since the stomach secretes highly acidic gastric juice, the duodenum must neutralize it before it moves further into the intestines. The Brunner’s glands<\/strong> in the duodenal wall secrete an alkaline mucus that helps protect the lining from stomach acid.<\/p>\n\n\n\n While the jejunum<\/strong> (option E) is primarily responsible for nutrient absorption, some absorption occurs in the duodenum, including:<\/p>\n\n\n\n The duodenum<\/strong> is the first and most important segment of the small intestine for digestion, whereas the jejunum<\/strong> primarily absorbs nutrients. Therefore, the correct answer is D) duodenum<\/strong>.<\/p>\n\n\n\n The portion of the small intestine that attaches to the cecum is the A) haustrum. C) ileum. D) duodenum. E) jejunum. The correct answer and explanation is : The correct answer is D) duodenum. Explanation: The duodenum is the first section of the small intestine, immediately following the stomach. It plays a critical role in […]<\/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-205815","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205815","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=205815"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205815\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=205815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=205815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=205815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
1. Structure & Location:<\/strong><\/h4>\n\n\n\n
2. Function in Digestion:<\/strong><\/h4>\n\n\n\n
\n
3. Neutralization of Acid:<\/strong><\/h4>\n\n\n\n
4. Absorption in the Duodenum:<\/strong><\/h4>\n\n\n\n
\n
Conclusion:<\/strong><\/h4>\n\n\n\n
![\"\"](\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/03\/image-1424.png\")
<\/figure>\n","protected":false},"excerpt":{"rendered":"