The involuntary sphincter that keeps the urethra closed when urine is not being passed is called the ________.
A) external urethral sphincter
B) internal anal sphincter
C) internal urethral sphincter
D) ileocecal sphincter

Question

Quizplus · Accepted Answer

The internal urethral sphincter is the involuntary sphincter that keeps the urethra closed when urine is not being passed. The external urethral sphincter is a voluntary sphincter that helps control the flow of urine, but it is not always effective in keeping the urethra closed. The internal anal sphincter and ileocecal sphincter are not relevant to the function of the urethra.

The Involuntary Sphincter That Keeps the Urethra Closed When Urine