Peristalsis
A)is under voluntary control.
B)involves the opening and closing of muscular sphincters.
C)involves back-and-forth movement for mixing.
D)is a wave of muscular contraction.
E)All of the choices are correct.

Question

Quizplus · Accepted Answer

Peristalsis is a wave of muscular contraction that propels contents through hollow organs. It is not under voluntary control, does not involve the opening and closing of muscular sphincters, and does not involve back-and-forth movement for mixing. Therefore, the best choice is D.