National Dental Examining Board of Canada (NDEB) Practice Exam

Question: 1 / 50

Vitamin D is mainly activated in which organ?

Skin

Kidney

Liver

Vitamin D is primarily activated in the liver, not the skin, kidney, or heart. The skin produces a precursor form of vitamin D when exposed to UV radiation, but it is ultimately activated in the liver. The kidney is responsible for converting vitamin D into its active form, but it does not activate vitamin D itself. The heart does not play a role in activating vitamin D. Therefore, the correct answer is C, the liver.

Heart