Question

The arrector pili muscle comes from cells in the dermis and causes:

a) cell division
b) growing stages
c) hair to lay down when relaxed
d) hair to stand on end when scared

Answer 1

The arrector pili muscle causes hair to stand on end when a person is scared or cold, resulting in goosebumps, but does not influence cell division, hair growth stages, or hair laying down.

Step-by-step explanation:

The arrector pili muscle is a smooth muscle found in the dermis layer of the skin. It is associated with hair follicles. When the arrector pili muscle contracts in response to stimuli such as cold or fear, it pulls on the hair follicle, causing the hair to stand up straight. This action results in the appearance of goosebumps on the skin. The contraction of the arrector pili muscle does not cause cell division, growing stages, or hair to lay down when relaxed; instead, its primary function is to make hair stand on end when an individual is scared or when the body is trying to conserve heat.