What is true about the urethral sphincters?
A) The internal urethral sphincter is under involuntary control.
B) Both sphincters are under voluntary control.
C) The external urethral sphincter is under involuntary control.
D) The internal urethral sphincter is made up of skeletal muscle.

Question

Quizplus · Accepted Answer

The internal urethral sphincter is under involuntary control and is made up of smooth muscle, which is not consciously controlled. This contrasts with the external urethral sphincter, which is under voluntary control and is made up of skeletal muscle.

What Is True About the Urethral Sphincters