Assertion: urethra's sphincter | /r/HasProperty | controlled
Facets:
value: voluntarily
type: MANNER
value: by the autonomic nerves
type: OTHER
Source sentences:
text: The internal urethral sphincter is involuntary and controlled by the autonomic nerves.
text: Because the lower external sphincter is skeletal muscle and voluntarily controlled, we can choose to keep it closed or it can be relaxed so that urine is flushed from the body.