What causes peristalsis?
A) relaxation of the circular muscle layer and contraction of the longitudinal muscle at the same segment
B) contraction of both the circular muscle layer and longitudinal muscle in the proximal segment coupled with the relaxation of both the circular muscle layer and longitudinal muscle in the distal segment
C) contraction of the circular muscle layer and relaxation of the longitudinal muscle at the same segment
D) contraction of the circular muscle layer and relaxation of the longitudinal muscle in the proximal segment coupled with the contraction of longitudinal muscle and relaxation of the circular muscle in the distal segment
E) relaxation of the circular muscle layer and contraction of the longitudinal muscle in the proximal segment coupled with the relaxation of longitudinal muscle and contraction of the circular muscle in the distal segment

Question

Quizplus · Accepted Answer

Peristalsis is caused by a coordinated sequence of muscle contractions and relaxations. Specifically, it involves the contraction of the circular muscle layer and relaxation of the longitudinal muscle in the proximal segment, followed by the contraction of the longitudinal muscle and relaxation of the circular muscle in the distal segment. This creates a wave-like motion that propels contents through the digestive tract.

What Causes Peristalsis