Choose the correct order of steps for the synthesis of Vitamin D.

a. Inactive vitamin D is transported to the liver where it is modified.

b. Inactive, chemically altered vitamin D is transported to the kidneys.

c. UV light strikes the skin and converts a steroid molecule into an inactive form of vitamin D.

d. Vitamin D is activated under the influence of PTH.

A. d, a, c, b

B. a, c, b, d

C. a, b, c, d

D. c, a, b, d

E. c, b, a, d

Question

Biology

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18 November, 04:58

Choose the correct order of steps for the synthesis of Vitamin D.

a. Inactive vitamin D is transported to the liver where it is modified.

b. Inactive, chemically altered vitamin D is transported to the kidneys.

c. UV light strikes the skin and converts a steroid molecule into an inactive form of vitamin D.

d. Vitamin D is activated under the influence of PTH.

A. d, a, c, b

B. a, c, b, d

C. a, b, c, d

D. c, a, b, d

E. c, b, a, d

+3

Answers (1)

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Seth Trujillo · Answer 1

Answer:D. c, a, b, d

Explanation:humans can synthesis vitamin D as cholecalciferol in the skin when the skin is exposed to ultraviolet-B from the sun. this cholecalciferol is modified to calcidiol in the liver. this calcidiol is then modified to calcitrol in the kidney. parathyroid hormone activates the vit D