Alimentary canal - functions

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

• saliva

• mucus

• gastric juice

• pancreatic juice

Protein digestion occurs mainly in

• 1 and 3

• 2 and 3

• 2 and 5

• 3 and 5

Bile is a digestive juice in our body. Which of the following statements about bile is correct?

• It is produced by the gall bladder.

• It contains an enzyme that digests fat.

• It helps break down fat into droplets.

• It stimulates peristaltic movement of the small intestine.

Chemical digestion of carbohydrate occurs in

• 1 and 2 only

• 1 and 4 only

• 2 and 3 only

• 3 and 4 only

Which structure(s) will produce the enzyme(s) needed for the digestion of egg white?

• X only

• X and Y only

• Y and Z only

• X, Y and Z

Physical digestion takes place at

• 1 and 3

• 1 and 4

• 3 and 4

• 1, 3 and 4

After eating a hamburger, chemical digestion begins in the

• mouth cavity

• oesophagus

• stomach

• small intestine

Which of the following organs produces digestive juice that does not contain enzymes?

• liver

• mouth

• stomach

• pancreas

Define the term ingestion

• The movement of nutrients from the digestive system into the blood

• The removal of undigested food from the body

• The breaking down of large insoluble molecules into small soluble molecules

• The taking in of nutrients.

Define the term digestion

• The movement of nutrients from the digestive system into the blood

• The removal of undigested food from the body

• The breaking down of large insoluble molecules into small soluble molecules

• The taking in of nutrients.