PPBM1321 Digestion & Absorption in GIT Quiz
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Questions and Answers

Where does the majority of digestion and absorption of carbohydrates, proteins, and lipids occur?

  • Stomach
  • Large intestine
  • Small intestine (correct)
  • Mouth
  • Which segment of the small intestine is the first 20-30 cm in length?

  • Colon
  • Jejunum
  • Duodenum (correct)
  • Ileum
  • What anatomical modifications aid in the functions of digestion and absorption in the small intestine?

  • Plicae circulares
  • Microvilli
  • Villi
  • All of the above (correct)
  • Which part of the digestive system is the longest and most convoluted?

    <p>Small intestine</p> Signup and view all the answers

    When does digestion begin and continue as food travels through the small intestine?

    <p>Mouth</p> Signup and view all the answers

    What is the movement of nutrients, water, and electrolytes from the lumen of the small intestine into the cell, then into the blood known as?

    <p>Absorption</p> Signup and view all the answers

    What is the function of villi in the small intestine?

    <p>Increase the surface area for absorption</p> Signup and view all the answers

    Where are microvilli found in the small intestine?

    <p>On the luminal surface of absorptive cells</p> Signup and view all the answers

    Which enzyme starts the breakdown of starch molecules in the mouth?

    <p>Salivary amylase</p> Signup and view all the answers

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

    <p>Moves chyme along the intestine</p> Signup and view all the answers

    What effect does distension of the small intestine have during a meal?

    <p>Enhances motility of the small intestine</p> Signup and view all the answers

    What is the composition of sucrose?

    <p>Glucose and fructose</p> Signup and view all the answers

    What is the function of disaccharidases in the small intestine?

    <p>Split disaccharides into monosaccharides</p> Signup and view all the answers

    Which part of the small intestine is particularly well developed and increases the absorptive surface area about three-fold?

    <p>Villi</p> Signup and view all the answers

    What is the role of segmentation in the small intestine?

    <p>Exposes chyme to intestinal mucosa for absorption</p> Signup and view all the answers

    What enhances the motility of the small intestine during a meal?

    <p>Extrinsic nerve stimulation</p> Signup and view all the answers

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