tombraider
Forum Junior
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During Normal micturition, pressure with the bladder increases in response to which of the following changes?
a) Contraction of the external sphincter?
b) Parasympathetic outflow from the sacral spinal cord?
c)Somatic efferent outflow from the sacral spinal cord?
d)Sympathetic outflow from the lumbar spinal cord?
e)Voluntary relaxation of the external sphincter?
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| new_n_lost
Forum Hero
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b) Parasympathetic outflow from the sacral spinal cord?
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| edie
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My guess is B also.
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| tombraider
Forum Junior
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Why not a)?
WHat i am thinking is: Parasympathetic outflow can relax the external sphincter and contract detrusor, which may decrease the transmural pressure to bladder and make micturition easier. also e) is similar to b).
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| yuna
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You will know the Ans here
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| black_horse
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the control of the external sphincter is only voluntary, and if it's contracted there will be no micturition, the only choice that would increase the pressure during micturition is B, so I think it's the the best answer.
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