Vitamin A
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Questions and Answers

What are the two main sources of preformed vitamin A?

  • Fruits and vegetables
  • Whole grains
  • Animal sources (correct)
  • Dairy products
  • How is vitamin A absorption aided?

  • By protein-rich diet
  • By bile salts, pancreatic lipase, and dietary fat (correct)
  • By high carbohydrate consumption
  • By water and fiber intake
  • What is the route of absorption for vitamin A in the body?

  • To the kidneys for filtration
  • To the intestines for further digestion
  • Lymphatic system and portal blood to the liver (correct)
  • Directly into the bloodstream
  • How is vitamin A stability affected by heat and light?

    <p>Prolonged heating in contact with air destroys it</p> Signup and view all the answers

    What is the physiological function of vitamin A in the vision cycle?

    <p>It is a necessary component of visual purple (rhodopsin)</p> Signup and view all the answers

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