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Refer to the given graph representing pe...

Refer to the given graph representing percentage of undigested starch in different parts of alimentary canal. Identify regions of alimentary canal P-S and select the correct statement.

A

P could be mouth, could be oesophagus, R could be stomach and S could be small intestine.

B

Digestion of food is completed in R which also possesses many finger-like projections in its wall that provide a large surface area for the absorption of food molecules.

C

Q secretes digestive juice which contains mucus, and enzyme amylase.

D

P makes the medium acidic to help the digestive enzyme to act upon food stuff.

Text Solution

Verified by Experts

The correct Answer is:
B
In the given graph P, Q, R and S represent different regions of the alimentary canal, i.e., mouth, stomach, small intestine and large intestine. Stomach secretes digestive juice which contains mucus, HCI and digestive enzymes. HCI secreted by stomach makes the medium acidic to help the digestive enzyme to eat upon food stuff.
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