Question

which layer of the gi tract causes peristalsis?
a mucosa
b submucosa
c longitudinal muscles
d circular muscles

Explanation:

Peristalsis in the GI tract is caused by coordinated contractions of the muscular layers. The circular and longitudinal muscles work together to create wave - like movements that propel food along. The longitudinal muscles shorten the tract segmentally while the circular muscles constrict to push the contents forward.

Answer:

C. Longitudinal muscles, D. Circular muscles