Physiology When the sympathetic nervous system is activated A Norepinephrine is released by the vascular smooth muscle cells B Acetylcholine is released onto vascular smooth muscle cells C Norepinephrine is released from axons onto the aeriolar wall D The aerioles constrict because nitric oxide production is suppressed 💡 Explanation When the sympathetic nervous system is activated ✓ Correct Answer: C. Norepinephrine is released from axons onto the aeriolar wall