PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The internal urethral sphincter is under voluntary control.
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The internal urethral sphincter regulates involuntary control of urine flow from the bladder to the urethra, and the external urethral sphincter provides voluntary control of urine flow from the bladder to the urethra.
Detailed explanation-2: -The internal urethral sphincter is not under voluntary, somatic nervous system control.
Detailed explanation-3: -It prevents urine leakage as the muscle is tonically contracted via sympathetic fibers traveling through the inferior hypogastric plexus and vesical nervous plexus. Specifically, it is controlled by the hypogastric nerve, predominantly via the alpha-1 receptor.
There is 1 question to complete.