Question

special smooth muscles in the dermis that when contracted produce goose bumps are called
cuticular papillae
arrector pili
tissue papillae
root sheaths

Explanation:

To solve this, we recall the structure of the skin. The arrector pili muscles are smooth muscles attached to hair follicles. When they contract, they cause the hair to stand up, creating "goose bumps" (cutis anserina). Cuticular papillae, tissue papillae, and root sheaths do not have this function. So the correct term for the smooth muscles producing goose bumps is arrector pili.

Answer:

B. Arrector pili