The sebaceous glands are simple alveolar glands that secrete a substance known as sebum. The secretion of sebum is stimulated ________.
A) by high temperatures
B) when the air temperature drops
C) by hormones, especially androgens
D) as a protective coating when one is swimming
C) by hormones, especially androgens
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The cerebellum is a region of the brain
Indicate whether the statement is true or false
The discoloration and swelling of a muscle strain is due to
A) excess myofibrils. B) ruptured blood vessels. C) severed nerves. D) separated tendons.
Secretion of insulin causes
A) a decrease in the permeability of cell membranes to glucose. B) an increase in the breakdown of glycogen to release glucose. C) an increase in the concentration of blood glucose. D) a decrease in the concentration of blood glucose.
An acid is a molecule that releases (donates) ________
A) protons (hydrogen ions) B) hydroxyl ions C) neutrons D) electrons