The stimulus for the production of vitamin D in the skin is:
A)heat
B)friction
C)pressure
D)ultraviolet rays

Question

Quizplus · Accepted Answer

The production of vitamin D in the skin is stimulated by exposure to ultraviolet rays, more specifically UVB radiation. When UVB radiation penetrates the skin, it triggers a reaction that converts a form of cholesterol in the skin into vitamin D3, which is then processed by the liver and kidneys to form the active hormone form of vitamin D. Heat, friction, and pressure do not stimulate vitamin D production.

The Stimulus for the Production of Vitamin D in the Skin