The external muscle layer of the alimentary tube is responsible for:
A)peristalsis
B)mechanical digestion
C)both A and B
D)both A and B and for some chemical digestion

Question

Quizplus · Accepted Answer

The external muscle layer, also known as the muscularis externa, contributes to peristalsis (contractions that move food through the digestive system) and mechanical digestion (breaking down food through physical movement). Therefore, both options A and B are correct. It does not contribute significantly to chemical digestion, so option D is not correct.

The External Muscle Layer of the Alimentary Tube Is Responsible