Lactose Intolerance and Galactosemia Quiz
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Questions and Answers

What happens to most fiber in the digestive tract?

  • It provides energy to the liver directly.
  • It is converted into water in the large intestine.
  • It is absorbed in the small intestine.
  • It is broken down by bacterial enzymes in the large intestine. (correct)

    • Which organ uses short-chain fatty acids for energy?

  • Liver (correct)
  • Stomach
  • Pancreas
  • Small intestine

    • Where does nutrient absorption primarily take place in the digestive system?

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

    • What role does fiber play in regulating bowel activity?

    <p>Holding water and adding bulk to stools</p> Signup and view all the answers

    How does glucose primarily get absorbed in the small intestine?

    <p>Active transport across the intestinal lining</p> Signup and view all the answers

    What is the main difference between lactose intolerance and milk allergy?

    <p>Milk allergy involves an immune response, while lactose intolerance affects sugar digestion</p> Signup and view all the answers

    What is the role of fibers in the small intestine?

    <p>Fibers attract water, softening the stool for passage</p> Signup and view all the answers

    What enzyme breaks down maltose into glucose + glucose in the small intestine?

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

    What happens to sugars and most starches within 1-4 hours after a meal?

    <p>They get digested, leaving only fibers in the digestive tract</p> Signup and view all the answers

    Which enzyme breaks down lactose into galactose + glucose in the small intestine?

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

    What is the primary function of fibers in delaying gastric emptying?

    <p>To provide feeling of fullness and satiety</p> Signup and view all the answers

    What is the final step in the digestion of disaccharides in the small intestine?

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

    What is the primary reason for the occurrence of lactose intolerance?

    <p>Insufficient lactase to digest glucose in milk</p> Signup and view all the answers

    How does galactosemia differ from lactose intolerance?

    <p>In galactosemia, there is a lack of enzymes needed for further galactose metabolism, while lactose intolerance involves insufficient lactase.</p> Signup and view all the answers

    Which organ is primarily affected by classic galactosemia?

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

    What are the products of metabolism called?

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

    Which sugar is broken down into glucose and galactose by the enzyme lactase?

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

    In individuals with galactosemia, what happens due to the diminished or missing enzymes for galactose metabolism?

    <p>Toxic levels of galactose 1-phosphate in tissues</p> Signup and view all the answers

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