Vitamins D and E Overview
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Questions and Answers

What is the primary pro vitamin D source in human and animal tissues?

  • Cholecalciferol
  • 7-dehydrocholesterol (correct)
  • Ergosterol
  • Calcidiol
  • Which form of vitamin D is considered the active form?

  • Calcidiol
  • Calcitriol (correct)
  • Ergocalciferol
  • 25-OH-D
  • Which of the following is a consequence of vitamin D deficiency in children?

  • Bone deformities (Rickets) (correct)
  • Hemolysis of red blood cells
  • Renal stones
  • Infertility
  • What is a symptom of vitamin E deficiency?

    <p>RBC hemolysis</p> Signup and view all the answers

    Excessive intake of vitamin D can lead to which of the following conditions?

    <p>Calcification of tissues</p> Signup and view all the answers

    Study Notes

    Vitamin D (Calciferol)

    • Vitamin D is a steroid ring
    • Ergosterol is the provitamin D in plants
    • 7-dehydrocholesterol is the provitamin D in humans and animals
    • Vitamin D has 2 forms: D2 and D3
    • Vitamin D activation involves UV light, liver, and kidney
    • Activated forms include calcifediol (25-OH-D) and calcitriol (1,25(OH)2D)

    Vitamin D Function

    • Normalizes serum calcium and phosphate levels
    • Normalizes bone by providing calcium and phosphate

    Vitamin D Deficiency

    • Rickets in children (bone deformities)
    • Osteomalacia in adults (softening of bones)

    Vitamin D Excess (Hypervitaminosis)

    • Abnormal calcification of tissue and deposition of calcium and phosphate in the kidney (renal stones)

    Vitamin E (Tocopherols)

    • Four types: α, β, γ, and δ
    • α-tocopherol is the most active form
    • Function:
      • Anti-sterility
      • Antioxidant
      • Protects from atherosclerosis and heart disease (prevents LDL oxidation)

    Vitamin E Deficiency

    • RBC hemolysis (due to oxidation) in premature infants
    • Infertility

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    Description

    This quiz covers essential information about Vitamins D and E, including their structures, functions, and deficiency effects. Participants will explore the roles of these vitamins in human health, such as the impacts of their insufficiency and excess. Test your knowledge on these vital nutrients and their biological significance.

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