Question

which of these can adjust the temperature of the body?
oil glands
hair follicles
blood vessels
pancreas

Explanation:

• Oil glands secrete sebum for skin/hair lubrication, not temperature regulation.
• Hair follicles are for hair growth, not temperature adjustment.
• Blood vessels (in the skin) can dilate/constrict: dilation releases heat, constriction retains heat, aiding thermoregulation.
• Pancreas regulates blood sugar (via insulin/glucagon), not body temperature.

Answer:

C. blood vessels