Like the digestive system, the urinary system has a series of two sphincters at its terminus. The first sphincter consists of smooth muscle under involuntary control, and the second sphincter consists of skeletal muscle under voluntary control.

Question

Quizplus · Accepted Answer

This statement is true. The first sphincter of the urinary system is the internal urethral sphincter, which is made of smooth muscle and is under involuntary control. The second sphincter is the external urethral sphincter, which is made of skeletal muscle and is under voluntary control.

Like the Digestive System, the Urinary System Has a Series