In the second-messenger
a. a small amount of one hormone (the second messenger) is required to release another.
b. a tropic hormone (the first messenger) stimulates secretion of another hormone (the second messenger).
c. the hormone first binds to a specific surface receptor, whereupon the hormone-receptor complex moves into the cell to combine with a specific intracellular receptor.
d. releasing hormones (the first messenger) from the hypothalamus regulate many anterior pituitary hormones (the second messenger).
e. a hormone (the first messenger) binds to surface receptors activating adenylate cyclase, catalyzing cAMP formation.
E
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