Cyclic adenosine monophosphate (cAMP) performs which of the following roles in the functioning of the endocrine system?
A) Mediating hormone synthesis by non–vesicle-mediated pathways
B) Acting as a high-affinity receptor on the surface of target cells
C) Inactivating hormones to prevent excess accumulation
D) Acting as a second messenger to mediate hormone action on target cells
Ans: D
Feedback:
cAMP is one of the most common second messengers, whose role is to generate an intracellular signal in response to cell surface receptor activation by a hormone. cAMP does not mediate hormone synthesis, act as a receptor itself, or inactivate hormones.
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