Question

multiple choice 1 point
which structure is responsible for goose bumps?
○ arrector pili muscles
○ melanocytes
○ sweat glands
○ sebaceous glands

multiple choice 1 point
sebaceous glands secrete:
○ sweat
○ keratin
○ sebum
○ melanin

Explanation:

First Question:

Goose bumps occur when arrector pili muscles (small muscles attached to hair follicles) contract, causing hair to stand up. Melanocytes produce melanin (pigment), sweat glands secrete sweat (for thermoregulation/excretion), and sebaceous glands secrete sebum (oily substance for skin/hair lubrication). So the structure for goose bumps is arrector pili muscles.

Sebaceous glands are oil - producing glands in the skin. They secrete sebum, which helps lubricate the skin and hair. Sweat is secreted by sweat glands, keratin is a protein in skin/hair/nails, and melanin is produced by melanocytes. So sebaceous glands secrete sebum.

Answer:

A. Arrector pili muscles

Second Question: