PPBM1321 Digestion & Absorption in GIT
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Questions and Answers

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

  • Small intestine (correct)
  • Mouth
  • Large intestine
  • Stomach

    • What is the function of plicae circulares in the small intestine?

  • To secrete digestive enzymes
  • To store undigested food temporarily
  • To increase surface area for absorption (correct)
  • To mix food with digestive juices

    • Which segment of the small intestine comes after the duodenum?

  • Jejunum (correct)
  • Ileum
  • Rectum
  • Colon

    • What is the primary function of the small intestine?

    <p>Absorption of nutrients, water, and electrolytes</p> Signup and view all the answers

    Which part of the small intestine is well adapted for digestion and absorption?

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

    What is the least convoluted organ in the digestive system?

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

    What is the function of villi in the small intestine?

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

    Which enzyme carries on the breakdown of starch in the small intestine?

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

    What is the function of segmentation in the small intestine?

    <p>Mixes chyme with digestive juices</p> Signup and view all the answers

    What causes the motility of the small intestine to be enhanced during a meal?

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

    What is the role of microvilli in the small intestine?

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

    What do disaccharidases do in the small intestine?

    <p>Fragment polysaccharides into disaccharides</p> Signup and view all the answers

    How does peristalsis differ from segmentation in the small intestine?

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

    What type of contractions are intestinal peristaltic contractions?

    <p>Weak and slow over short distances</p> Signup and view all the answers

    Which type of dietary carbohydrate makes up approximately 50% of the human diet?

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

    What initially acts upon starch molecules in the mouth and stomach?

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

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