Exposure to ultraviolet light directly facilitates which of the following?

A. Conversion of 7 dehydrocholesterol to 25-hydroxycholecalciferol

B. Conversion of 25-hydroxycholecalciferol to 1,25- dihydroxycholecalciferol

C. Transpo of calcium into the extracellular fluid

D. Formation of calcium-binding protein

Correct Answer: Conversion of 7 dehydrocholesterol to 25-hydroxycholecalciferol

Description: Ultraviolet light absorbed by the skin directly facilitates conversion of cholesterol to 25-hydroxycholecalciferol.

Category: Physiology

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