The layer of the alimentary tube that produces digestive secretions is the:
A)mucosa
B)submucosa
C)external muscle layer
D)mesentery

Question

Quizplus · Accepted Answer

The mucosa is the layer of the alimentary tube that contains the cells that actively produce digestive secretions such as hydrochloric acid, pepsin, and various digestive enzymes. The submucosa is a layer of loose connective tissue that contains blood vessels, lymphatic vessels, and nerve endings. The external muscle layer is responsible for the mechanical processing and propulsion of food through the alimentary tube. The mesentery is a supportive membrane that connects the intestines to the abdominal wall.

The Layer of the Alimentary Tube That Produces Digestive Secretions