Multiple choice

What is the connection between ultraviolet radiation and the vitamin D in human beings?

  1. UV rays stimulate the synthesis of vitamin D in humans.

  2. UV rays synthesise vitamin D in our bodies.

  3. There is an inverse connection between ultraviolet radiation and the production of vitamin D in our bodies.

  4. UV rays stop human bodies from synthesing vitamin D.
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A Correct answer
Explanation

Ultraviolet radiation must penetrate the outer skin layer in order to produce the vitamin D. This is important because vitamin D is vital for the intestine to absorb calcium and phosphorus from food for bone growth and repair.

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