Question

What layer of the alimentary canal wall is responsible for absorption and secretion?

a. Adventitia
b. Mucosa
c. Muscularis externa
d. Submucosa
e. Visceral layer of the peritoneum

Answer 1

Answer: b. Mucosa

Step-by-step explanation:

The mucosa is also called as the mucous membrane. It is a moist later of the epithelial membrane. It lines up the alimentary canal from the mouth to the anus.

It has three major functions in the digestive system of the body.

1. It secrete mucus, enzymes, and hormones that aid in digestion.

2. It absorbs the end products of the digestion directly into the blood stream.

3. It protects against infectious disease.

Answer 2

The correct answer is B. The mucosa is responsible for absorption and secretion.

Step-by-step explanation:

The mucosa is the deepest layer of the intestinal tract, surrounding the lumen, or space inside the tube. This layer comes into direct contact with food (or bolus) and is responsible for absorption and secretion, which are important processes in digestion.

The mucosa is highly specialized in each organ of the intestinal tract, facing a low pH in the stomach, absorbing a multitude of different substances in the small intestine and also absorbing specific amounts of water in the large intestine.