What structure is formed by the thickening of the smooth muscle cell wall surrounding the bladder that regulates the flow of urine from the bladder?
A)detrusor muscle
B)internal urethral sphincter
C)external urethral sphincter
D)bladder sphincter
E)urethral muscle

Question

Quizplus · Accepted Answer

The internal urethral sphincter is a thickening of the smooth muscle at the bladder neck that regulates urine flow from the bladder.

What Structure Is Formed by the Thickening of the Smooth