The internal sphincter of the urinary bladder is under involuntary control whereas the external sphincter is under voluntary control.

True

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False

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Solution

The correct option is A True
The internal sphincter which is under involuntary control relaxes when the urinary bladder is full. The external sphincter, which is under voluntary control, relaxes only with conscious will.

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The SNS controls the involuntary actions, whereas the ANS controls the voluntary muscles.

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