What effect does the sympathetic nervous system have on micturition?
A) Sympathetic activity excites muscles of the internal urethral sphincter allowing micturition.
B) Sympathetic activity inhibits muscles of the external urethral sphincter inhibiting micturition.
C) Sympathetic activity excites muscles of the external urethral sphincter allowing micturition.
D) Sympathetic activity excites muscles of the internal urethral sphincter inhibiting micturition.
E) Sympathetic activity inhibits muscles of the internal urethral sphincter inhibiting micturition.
Answer: D) Sympathetic activity excites muscles of the internal urethral sphincter inhibiting micturition.
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