Physiochemical Properties of Dietary Fibre: Solubility in Water
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Questions and Answers

Which factor does NOT influence Water Holding Capacity (WHC) according to the text?

  • Fiber's solubility in water
  • Degree of processing of food
  • pH of the GI tract
  • Presence of cellulose lignin (correct)

    • What does Water Holding Capacity (WHC) refer to?

  • The thickness of the mucin-rich water layer in the small intestine
  • The ability of soluble fiber to absorb water in the digestive tract (correct)
  • The rate of lipid absorption in the large intestine
  • The speed of fecal passage through the colon

    • How do coarsely ground bran particles differ from finely ground ones?

  • They decrease fecal volume
  • They have lower Water Holding Capacity (WHC)
  • They slow down the rate of fecal passage
  • They increase hydration capacity (correct)

    • What effect does soluble fiber have on lipid absorption in the digestive tract?

    <p>It binds fatty acids and prevents their absorption</p> Signup and view all the answers

    How do gums impact glucose absorption within the intestinal lumen?

    <p>They slow down glucose absorption by reducing convective movement</p> Signup and view all the answers

    What effect do soluble fibres generally have on gastric emptying?

    <p>Delay gastric emptying</p> Signup and view all the answers

    Which type of dietary fibre dissolves in hot water?

    <p>Water soluble fibre</p> Signup and view all the answers

    Which component is capable of forming highly viscous solutions?

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

    What is the role of viscous polysaccharides in the small intestine?

    <p>Disrupt mixing of enzymes and substrates</p> Signup and view all the answers

    How do water retaining pectins and gums impact glucose appearance in the plasma?

    <p>Blunt the appearance of glucose</p> Signup and view all the answers

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