Question

which of the following are functions of hair?
select all that apply
a provides sensory input from all over the body
b to trap dust particles and microorganisms in the nose
c prevents heat loss
d protects the head from uv radiation

Explanation:

• Option a: Hair follicles have nerve endings that can provide some sensory input, but it's not from "all over the body" in a comprehensive sense like the skin's sensory receptors. However, it does contribute to sensory perception.
• Option b: Nasal hair traps dust particles and microorganisms, preventing them from entering the respiratory system.
• Option c: Hair (especially body hair in some animals and fine body hair in humans) can help in preventing heat loss by reducing air - flow over the skin.
• Option d: Hair on the head (scalp hair) acts as a physical barrier against UV radiation.

Answer:

a. provides sensory input from all over the body, b. to trap dust particles and microorganisms in the nose, c. prevents heat loss, d. protects the head from UV radiation