Gastrointestinal tract

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Questions and Answers

Which layer of the gastrointestinal system contains Meissner's submucosal nerve plexus?

  • Submucosa (correct)
  • Mucosa
  • Serosa
  • Muscularis

Which layer of the gastrointestinal system contains Auerbach's myenteric nerve plexus?

  • Muscularis (correct)
  • Mucosa
  • Serosa
  • Submucosa

What is the outermost layer of the gastrointestinal system called?

  • Mucosa
  • Serosa (correct)
  • Submucosa
  • Muscularis

Which layer of the GI tract consists of loose connective tissue, blood and lymphatic vessels, and sometimes glands?

<p>Submucosa (B)</p> Signup and view all the answers

Which layer of the GI tract contains an inner circular layer and an outer longitudinal layer of smooth muscle?

<p>Muscularis (A)</p> Signup and view all the answers

Which layer of the GI tract consists of loose connective tissue without mesothelium?

<p>Adventitia (B)</p> Signup and view all the answers

Which layer of the GI tract covers most of the digestive tract and accessory glands in the abdominal cavity?

<p>Adventitia (C)</p> Signup and view all the answers

Which region of the stomach has long pits and parietal cells?

<p>Fundus region (D)</p> Signup and view all the answers

What is the function of the small intestine?

<p>Absorb final products of digestion (D)</p> Signup and view all the answers

What are the anatomical regions of the small intestine, in order from proximal to distal?

<p>Duodenum, jejunum, ileum (D)</p> Signup and view all the answers

Which type of cells in the small intestine produce mucus for protection?

<p>Goblet cells (C)</p> Signup and view all the answers

What structures contribute to the large surface area of the small intestine?

<p>All of the above (D)</p> Signup and view all the answers

Which cells in the small intestine produce lysozyme and defensins, which are antibacterial substances?

<p>Paneth cells (B)</p> Signup and view all the answers

Which cells in the small intestine eat bugs/foreign stuff and present antigens to immune cells?

<p>M (microfold) cells (C)</p> Signup and view all the answers

Which cells in the small intestine replenish the cells of the epithelium?

<p>Stem cells (B)</p> Signup and view all the answers

Which layer of the large intestine is similar to the small intestine?

<p>Submucosa (A)</p> Signup and view all the answers

Which layer of the colon is responsible for the formation of taenia coli?

<p>Muscularis externa (A)</p> Signup and view all the answers

Which part of the large intestine has a histology similar to the colon but lacks taenia coli?

<p>Appendix (A)</p> Signup and view all the answers

What type of epithelium is found in the rectum?

<p>Stratified squamous epithelium (A)</p> Signup and view all the answers

Which layer of the GI tract contains the Auerbach's myenteric nerve plexus?

<p>Muscularis (C)</p> Signup and view all the answers

What is the function of the Meissner's submucosal nerve plexus?

<p>Regulating GI motility (C)</p> Signup and view all the answers

Which layer of the GI tract covers the digestive tract and accessory glands in the abdominal cavity?

<p>Serosa (A)</p> Signup and view all the answers

Which cells in the stomach secrete pepsinogen, which is converted into pepsin by HCl?

<p>Chief cells (D)</p> Signup and view all the answers

Which cells in the stomach make intrinsic factor, which is necessary for B12 absorption?

<p>Parietal cells (D)</p> Signup and view all the answers

Which cells in the stomach release gastrin when there is protein in the stomach?

<p>Enteroendocrine cells (B)</p> Signup and view all the answers

What is the total surface area of the small intestine?

<p>2700 square feet (B)</p> Signup and view all the answers

Which layer of the gastrointestinal system contains the Meissner's submucosal nerve plexus?

<p>Submucosa (C)</p> Signup and view all the answers

Which layer of the GI tract covers most of the digestive tract and accessory glands in the abdominal cavity?

<p>Adventitia (B)</p> Signup and view all the answers

What are the anatomical regions of the small intestine, in order from proximal to distal?

<p>Duodenum, jejunum, ileum (A)</p> Signup and view all the answers

Which part of the large intestine has a histology similar to the colon but lacks taenia coli?

<p>Cecum (C)</p> Signup and view all the answers

Which layer of the gastrointestinal system contains the most lymphatic tissue?

<p>Submucosa (A)</p> Signup and view all the answers

Which layer of the large intestine lacks taenia coli?

<p>Muscularis externa (C)</p> Signup and view all the answers

What is the histology of the rectum?

<p>Stratified squamous epithelium (A)</p> Signup and view all the answers

Which layer of the GI tract is responsible for the formation of the rectal columns of Morgagni?

<p>Muscularis mucosa (C)</p> Signup and view all the answers

Which cells in the small intestine are responsible for producing lysozyme and defensins, which are antibacterial substances?

<p>Paneth cells (C)</p> Signup and view all the answers

Which cells in the small intestine are responsible for eating bugs/foreign stuff and presenting antigens to immune cells?

<p>M (microfold) cells (B)</p> Signup and view all the answers

Which cells in the small intestine are responsible for replenishing the cells of the epithelium?

<p>Stem cells (D)</p> Signup and view all the answers

Which cells in the small intestine produce mucus for protection?

<p>Mucous goblet cells (C)</p> Signup and view all the answers

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