Question

the sebaceous glands are simple alveolar glands that secrete a substance known as sebum. the secretion of sebum is stimulated ______. when the air temperature drops as a protective coating when one is swimming by high temperatures by hormones, especially androgens

Explanation:

Sebum secretion is regulated by hormones. Androgens, which are present in both males and females (though in higher levels in males), play a significant role in stimulating sebaceous gland activity. High temperatures do not directly stimulate sebum secretion in the way hormones do. When air temperature drops, it is more related to thermoregulation mechanisms like vasoconstriction rather than sebum - related processes. While sebum does have some protective properties, it is not secreted specifically as a protective coating when swimming.

Answer:

by hormones, especially androgens