Ingestion, digestion and absorption

Bile juice helps in the digestion of fat because it contains

• enzymes

• vitamins

• bile salts

• bile pigments

Which of the following animals does not possess canine teeth?

• cat

• man

• tiger

• rabbit

The diagram shows the cross section of a villus. Which of the following products of digestion is absorbed into structure 1?

• vitamin A

• vitamin B

• calcium

• iron

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

In an operation, a large part of the colon of a person was removed. As a result, the person could not

• take in solid food

• produce sufficient digestive enzymes

• absorb amino acids efficiently

• produce solid faeces

Tags

NGSS.MS-LS1-7

The stomach wall produces mucus to cover its surface. Which of the following statements correctly describe(s) the function of the mucus?

(1) It kills the bacteria in the ingested food.

(2) It prevents the rubbing of food against the stomach wall.

(3) It protects the stomach wall from the action of the digestive enzymes.

• (1) only

• (3) only

• (1) and (2) only

• (2) and (3) only

The diagram shows the cross section of a villus.

The main food substance absorbed into structure 1 is

• fatty acids

• vitamins

• glucose

• fat

Tags

NGSS.MS-LS1-3

In the alimentary canal, most water is absorbed in the

• oesophagus

• stomach

• small intestine

• colon

In the alimentary canal, bacteria in food are mainly killed by

• saliva

• mucus

• gastric juice

• pancreatic juice

The liver is said to be a digestive gland because it

• converts stored glycogen into glucose

• breaks down excess amino acids

• produces bile

• stores iron

Which of the following food substances is/are absorbed directly without digestion?

(1) vitamin C

(2) sucrose

(3) polypeptide

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only