Which of the following statements is true?
a. Although hormones are carried to all parts of the
body, they produce effects only in cells with
proper receptors.
b. Hormones are limited to steroid compounds.
c. Hormones are secreted by specialized exocrine
glands.
d. Most hormones are controlled by positive
feedback mechanisms involving the pituitary
gland.
e. Target cell response to the secretion of a
hormone is as rapid as an effector response in
the nervous system.
Answer: a
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