Vitamin D Overview
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Questions and Answers

Which vitamin D form is the biologically active one?

  • 1,25-dihydroxyvitamin D (calcitriol) (correct)
  • Cholecalciferol (D3)
  • 25-hydroxyvitamin D
  • Ergocalciferol (D2)

    • Where is vitamin D converted to calcidiol?

  • Kidneys
  • Liver (correct)
  • Skin
  • Intestines

    • What is the role of active vitamin D in the intestines?

  • Stimulate calcium retention in the kidneys
  • Increase bone breakdown
  • Increase calcium and phosphorus absorption (correct)
  • Support mineralization of bones

    • What condition does vitamin D deficiency cause in children?

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

    How much is the daily Recommended Dietary Allowance for adults?

    <p>20 micrograms/day</p> Signup and view all the answers

    What is the function of calcitriol in the kidneys?

    <p>Reduce calcium loss in urine</p> Signup and view all the answers

    Which vitamin D form is derived from animals?

    <p>Cholecalciferol (D3)</p> Signup and view all the answers

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