Question

What is the most likely consequence for a human of not spending at least 20 minutes a day with a portion of one's skin exposed to the sun?
Digestion could slow down due to lack of warmth to speed up the reactions of enzymes.
Bones could become brittle due to lack of vitamin D, which is needed for calcium absorption.
Muscles could become weak due to lack of energy, which is needed to make the cells contract.
Skin could lose its protective oily coating due to lack of adequate excretion from sweat glands.

Answer 1

I know it's not the first one.

Answer 2

@DonnieDarko @help123please. @amistre64 @Wimsicle @LazyBoy @keskerem

Answer 3

@WeNeedDaAnswas

Answer 4

@blackilluminati

Answer 5

The answer is most probably bones becoming brittle.
Vitamin D is a group of fat-soluble secosteroids responsible for intestinal absorption of calcium and phosphate. In humans, the most important related compounds of vitamin D are vitamin D2 and vitamin D3. The body can also synthesize vitamin D (from cholesterol) when sun exposure is adequate

Deficiency can cause softening of bones because of inadequate amount of calcium ion needed for hardening and stregthing the bones.

Im not sure, But this is what I think. If this answer suits with your own intution then ^_^
Peace <3

Answer 6

thanks a lot :)