The action of sunlight on 7-dehydrocholesterol forms:
A) cholecalciferol.
B) retinol.
C) parathyroid hormone.
D) 25-hydroxy vitamin D.
Correct Answer:
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Q18: Deficiencies of vitamins _ and _ are
Q19: Which form of vitamin A is involved
Q20: _ is a visual pigment that helps
Q21: Keratomalacia most severely effects the:
A)eyes.
B)liver.
C)skin.
D)tongue.
Q22: Which statement about vitamin D toxicity is
Q24: Xerophthalmia occurs from:
A)high intake of preformed vitamin
Q25: The primary function of vitamin D in
Q26: Which form(s)of vitamin A has antioxidant properties?
A)Carotenoids
B)Preformed
Q27: Vitamin D acts primarily in the:
A)skin and
Q28: When vitamin A is deficient,there is a
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