Which Layer of the Wall of the Digestive Tract Is

Question

Which layer of the wall of the digestive tract is responsible for peristalsis?
A) serosa
B) submucosa
C) muscularis
D) mucosa

Accepted Answer

The muscularis layer of the digestive tract is responsible for peristalsis, which is the movement of food through the digestive tract via rhythmic contractions of smooth muscle. The serosa is the outermost layer, the submucosa is responsible for blood vessels and nerves, and the mucosa contains the epithelium and glands responsible for secretion and absorption.