Cholecalciferol must undergo 2 conversion steps before it becomes the active form of vitamin D, calcitriol. Those steps take place in the _____ and the _____.

Question

Quizplus · Accepted Answer

Cholecalciferol (vitamin D3) is first converted to 25-hydroxycholecalciferol in the liver, and then to the active form of vitamin D, calcitriol, in the kidneys. Therefore, the two conversion steps take place in the liver and kidney, making choice B the correct answer.

Cholecalciferol Must Undergo 2 Conversion Steps Before It Becomes the Active