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

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

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

What is the least convoluted organ in the digestive system?

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

What is the function of villi in the small intestine?

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

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

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

What is the function of segmentation in the small intestine?

<p>Mixes chyme with digestive juices (C)</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 (B)</p> Signup and view all the answers

What is the role of microvilli in the small intestine?

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

What do disaccharidases do in the small intestine?

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

How does peristalsis differ from segmentation in the small intestine?

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

What type of contractions are intestinal peristaltic contractions?

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

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

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

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

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

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