Multiple Choice
When the hormone epinephrine binds to receptors on the surface of a heart muscle cell, a new molecule, called cyclic AMP, is produced. Cyclic AMP then causes the heart muscle cells to contract more strongly, increasing blood flow throughout the body. In this example, cyclic AMP is acting as a(n)
A) second messenger.
B) hormone.
C) target cell.
D) energy carrier.
E) intercellular enzyme.
Correct Answer:
Verified
Correct Answer:
Verified
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