Within the urinary system, the storage reflex involves
A. contraction of the detrusor muscle and relaxation of the internal urethral sphincter.
B. relaxation of both the detrusor muscle and the internal urethral sphincter.
C. contraction of both the detrusor muscle and the internal urethral sphincter.
D. relaxation of the detrusor muscle and contraction of the internal urethral sphincter.
Answer: D
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