Which of the following occurs during micturition?
A) The detrusor muscles relax, muscles of the internal urethral sphincter contract, and muscles of the external urethral sphincter contract.
B) The detrusor muscles contract, muscles of the internal urethral sphincter relax, and muscles of the external urethral sphincter relax.
C) The detrusor muscles contract, muscles of the internal urethral sphincter contract, and muscles of the external urethral sphincter contract.
D) The detrusor muscles relax, muscles of the internal urethral sphincter contract, and muscles of the external urethral sphincter relax.
E) The detrusor muscles relax, muscles of the internal urethral sphincter relax, and muscles of the external urethral sphincter relax.
Answer: B) The detrusor muscles contract, muscles of the internal urethral sphincter relax, and muscles of the external urethral sphincter relax.
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A) cardioregulatory center B) swallowing reflex center C) reflex centers for sneezing and coughing D) reflex center for vomiting E) all of these
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A. Hypothalamus B. Cerebellum C. Motor cortex D. Basal nuclei
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