Q6 of 34 Page 94

What are three major types of cells found in the gastric glands? Name their secretions.

The three major types of cells found in the gastric glands with their secretions are as follows:

i. Mucous Neck cells – they secrete mucus


ii. Peptic or chief cells – they secrete Proenzyme Pepsinogen and Prorennin


iii. Parietal or oxyntic cells – they secrete HCl and intrinsic factor. Intrinsic factor is essential for absorption of vitamin B12.


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4

What is the role of gall bladder? What may happen if it stops functioning or is removed?

 5

Correct the statement given below by the right option shown in the bracket against them

a. Absorption of amino acids and glycerol takes place in the. (small intestine/ large intestine)


b. The faeces in the rectum initiate a reflex causing an urge for its removal. (neural /hormonal)


c. Skin and eyes turn yellow in infection. (liver /stomach)


d. Rennin is a proteolytic enzyme found in gastric juice in (infants / adults).


e. Pancreatic juice and bile are released through. (intestinepancreatic/ hepato- pancreatic duct)


f. Dipeptides, disaccharides and glycerides are broken down into simple substances in region of small intestine. (jejunum/ duodenum)


 7

How is the intestinal mucosa protected from the acidic food entering from stomach?

 8

How are the activities of gastro-intestinal tract regulated?