When the sympathetic nervous system is activated:
Correct Answer: Norepinephrine is released from axons onto the arteriolar wall
Description: Ans. C. Norepinephrine is released from axons onto the arteriolar wallNerve fibers, not vascular smooth muscle, release norepinephrine. The norepinephrine from the sympathetic nerves simply diffuses from the axons and binds to specific receptors on smooth muscle cells.
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Physiology
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