The ________ nervous system facilitates increased blood flow to the penis by facilitating local release of ________.

A. parasympathetic; norepinephrine
B. sympathetic; norepinephrine
C. parasympathetic; nitric oxide
D. sympathetic; nitric oxide
E. somatic; acetylcholine


Answer: C

Anatomy & Physiology

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Fill in the blank(s) with the appropriate word(s).

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