Digestion and Absorption of Carbohydrates in Gastrointestinal System
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Questions and Answers

Which class of carbohydrates consists of more than 10 monosaccharide units?

  • Monosaccharides
  • Oligosaccharides
  • Polysaccharides (correct)
  • Disaccharides
  • What is the main nutritional role of carbohydrates?

  • To aid in the digestion of proteins
  • To provide insulation in the body
  • To provide structural support to cell membranes
  • To store and release energy (correct)
  • Which compound arises from the digestion of carbohydrates and becomes a substrate for further metabolism?

  • Oligosaccharides
  • Polysaccharides
  • Monosaccharides (correct)
  • Disaccharides
  • What is the fate of absorbed monosaccharides?

    <p>They are used for energy or converted to other compounds</p> Signup and view all the answers

    What are the clinical signs and symptoms of lactose intolerance?

    <p>Constipation and diarrhea</p> Signup and view all the answers

    Which enzyme is responsible for the initial digestion of carbohydrates in the mouth?

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

    What is the major storage carbohydrate in animals?

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

    What is the action of pancreatic amylase?

    <p>Hydrolyzing α-(1,4) glycosidic linkage from molecules like starch and glycogen</p> Signup and view all the answers

    Where do the lactase and cerebrosidase activities reside?

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

    What is trehalose?

    <p>A disaccharide of two glucose residues in β-1,4-glycosidic linkage</p> Signup and view all the answers

    Monosaccharides are the main storage form of energy in the body.

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

    Polysaccharides consist of 2-10 monosaccharide units.

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

    Carbohydrates serve as the structural component of cell membranes.

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

    Oligosaccharides provide 4 kcal per gram.

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

    Lactose intolerance is caused by the deficiency of lactase, an enzyme responsible for breaking down lactose in the intestines.

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

    Starch provides 90% of dietary calories in humans worldwide.

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

    Glycogen is the major storage carbohydrate in higher plants.

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

    Pancreatic amylase and salivary amylase have similar optimum pH levels.

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

    Trehalose is a monosaccharide composed of two glucose residues.

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

    Disaccharidases are secreted through the brush border membranes of the intestinal mucosal cells.

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

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