The internal urethral sphincter is formed by circular smooth muscle. The external urethral sphincter is derived from voluntary skeletal muscle.
A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The second statement is true; the first is false.

Question

Quizplus · Accepted Answer

Both statements are accurate. The internal urethral sphincter is indeed formed by circular smooth muscle and is under involuntary control, typically managed by the autonomic nervous system. The external urethral sphincter, on the other hand, is made up of voluntary skeletal muscle, allowing for conscious control over urination.

The Internal Urethral Sphincter Is Formed by Circular Smooth Muscle