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Digestive Juices

Which of the ...

Question

Which of the following is FALSE about Gastric Juice?

A

It is secreted by the inner line of the stomach.

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B

It contains the enzyme called Pepsin.

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C

It is white in color.

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D

It kills the germs entered along with food.

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Solution

The correct option is C
It is white in color.

Gastric juice is colorless.

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Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Rumen in cow is actually the true stomach. ( )
2. Digestion of food starts in the mouth. ( )
3. Gastric juice is secreted by the small intestine. ( )
4. An enzyme called ptyalin is present in saliva. ( )
5. Villi helps in digestion of food. ( )

The stomach secretes gastric juice, which contains hydrochloric acid. What is its function ?

Q. When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into small intestine for further digestion.
(a) What is (i) gland A (ii) substance B, and (iii) enzyme C?
(b) Name the tube D.
(c) What is the movement E known as?
(d) What are (i) F (ii) G, and (iii) H?

Q. Name the following :
(f) An enzyme secreted by gastric glands in the stomach which acts on proteins.

Q. Read the following statements (A-D).
(A) The stomach stores the food for

4 - 5

hours.
(B) The food mixes throughly with the acidic intestinal juice.
(C) Trypsinogen is activated by an enzyme enterogastrone, secreted by the intestinal muscosa.
(D) Renin is enzyme found in gastric juice of infants which helps in digestion of milk protein.
How many of the given statements are wrong?

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