Choose the TRUE statement(s) about micturition. (Select all that apply.)
a. In a patient with a spinal injury (no neural connection between brain and bladder or urinary sphincters), urine will flow constantly from the bladder to the outside.
b. During the filling phase, smooth muscles in the wall of the bladder are inhibited and relaxed, but smooth muscles of the urinary sphincters are stimulated and contracting.
c. During the micturition phase, the detrusor muscle is stimulated to contract by a spinal reflex via parasympathetic neurons.
d. The internal urinary sphincter is under voluntary control.
Answer:
b. During the filling phase, smooth muscles in the wall of the bladder are inhibited and relaxed, but smooth muscles of the urinary sphincters are stimulated and contracting.
c. During the micturition phase, the detrusor muscle is stimulated to contract by a spinal reflex via parasympathetic neurons
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