Out of four layers of alimentary canal, which one

ATI RN

ATI RN Test Bank

Out of four layers of alimentary canal, which one forms villi, (finger-like projection)?

A. Serosa B. Mucosa C. Submucosa D. Muscularis

Correct Answer: B

Rationale: The mucosa layer forms villi, increasing the surface area for absorption in the small intestine.

Gastric lipase is secreted by -

A. Stomach B. Pancreas C. Liver D. Ileum

Correct Answer: A

Rationale: Gastric lipase is secreted by the stomach to initiate fat digestion.

Removal of waste from body in the form of undigested food is called

A. Digestion B. Absorption C. Assimilation D. Egestion

Correct Answer: D

Rationale: Egestion is the removal of undigested waste from the body.

What statement is wrong about bile?

A. It is necessary for fat digestion B. It is stored in the gall bladder C. It is important only for normal digestion of sugar D. It activates lipase

Correct Answer: C

Rationale: Bile is not involved in sugar digestion; it emulsifies fats for digestion.

Enzyme pepsin acts upon food at a pH of about-

A. 1.8 to split proteins B. 2 to split carbohydrate C. 7 to change protein into peptones D. 2 to change protein in amino acids

Correct Answer: A

Rationale: Pepsin works at a pH of about 1.8 to break down proteins into peptides.

$89/ 30 days

$150/ 90 days