Question

Observe the diagram of the human digestive system. The labels (i) to (iv) represent the different parts of the digestive system. Match the correct part of the digestive system in column I to its corresponding function in column II.

Column I	Column II
i	a) Increases the efficiency of lipase enzyme action
ii	b) Responsible for absorption of more water from undigested food
iii	c) Stores bile
iv	d) Digestion of food is taken care of by gastric glands present here

[0.8 Mark]

• A. i.- c) ; ii – b) ; iii – d) ; iv- a)
• B. i.- a) ; ii – d) ; iii – b) ; iv- c)
• C. i.- c) ; ii – a) ; iii – d) ; iv- a)
• D. i.- d) ; ii – a) ; iii – c) ; iv- b)

Answer 1

The correct option is B i.- a) ; ii – d) ; iii – b) ; iv- c)

i) Liver: It produces bile juice. Bile is responsible for the emulsification of fats. Bile salts break the larger fat globules into smaller globules, increasing the efficiency of lipase enzyme action.

ii) Stomach: The digestion in the stomach is taken care of by the gastric glands present in the walls of the stomach. These release hydrochloric acid, a protein digesting enzyme called pepsin, and mucus.

iii) Large intestine: It helps in absorption of excess water from the undigested waste, hence solidifying the undigested waste.

iv) Gall bladder: Bile juice produced by the liver is stored in the gall bladder.