Physiology: Functions of the Skin

Question 1

Which type of vitamin D is made in the skin by the action of sunlight (mainly UVB) on 7-dehydrocholesterol?

Answer 1

Vitamin D3 (cholecalciferol)

Question 2

What is the main role of vitamin D?

Answer 2

Increases the flow of calcium into the bloodstream, enabling the normal mineralisation of bone

Question 3

Name two substances metabolised by the skin

Answer 3

Vitamin D and Triiodothyronine (T3)