Small Intestine Sections and Functions
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Questions and Answers

What is the main function of the gastric glands in the stomach?

  • To produce mucus
  • To regulate stomach pH
  • To absorb nutrients
  • To secrete digestive enzymes (correct)

What type of cells primarily make up the walls of the gastric pit?

  • Mucous cells (correct)
  • Enteroendocrine cells
  • Oxyntic cells
  • Goblet cells

What is the approximate increase in surface area of the small intestine due to the combination of circular folds, villi, and microvilli?

  • 800-fold
  • 500-fold
  • 600-fold (correct)
  • 700-fold

How does the stomach protect itself from self-digestion?

<p>By secreting a thick coat of bicarbonate-rich mucus (B)</p> Signup and view all the answers

Which part of the small intestine is responsible for the absorption of bile acids and vitamin B12?

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

What is the main function of the small intestine in the digestive system?

<p>To absorb nutrients (D)</p> Signup and view all the answers

What is the outermost layer of the gastrointestinal tract composed of?

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

What is the name of the junction that connects the small intestine to the large intestine?

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

What are the two main types of gastric glands in the stomach mucosa?

<p>Oxyntic and pyloric glands (A)</p> Signup and view all the answers

Which of the following neural plexuses is located in the submucosa layer of the gastrointestinal tract?

<p>Meissner’s plexus (A)</p> Signup and view all the answers

What is the main function of the duodenum in the small intestine?

<p>Neutralisation of protein, lipid, and carbohydrate digestion (C)</p> Signup and view all the answers

What is the main function of the mucosa layer in the gastrointestinal tract?

<p>Absorption of nutrients and secretion of hormones (C)</p> Signup and view all the answers

What percentage of total saliva secretions is contributed by the major salivary glands?

<p>90% (D)</p> Signup and view all the answers

What is the primary function of saliva in digestion?

<p>Moisten the food (D)</p> Signup and view all the answers

What is the pH of saliva?

<p>7 (C)</p> Signup and view all the answers

What is the pharynx part of?

<p>Both the digestive and respiratory systems (A)</p> Signup and view all the answers

What component of the digestive system processes ingested foods into molecular forms?

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

What is the purpose of the digestive system?

<p>To transfer small molecules, ions, and water to the body's internal environment (B)</p> Signup and view all the answers

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