Stomach is a very important organ in the digestive system. The food is churned in stomach for nearly three hours. Which of the following is found in the stomach?

Amylase, Gastric juice, Intestinal juice

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Dilute Hydrochloric acid, Pepsinogen and Mucus

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Bile, Alkaline salts, Trypsin

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Villi, Lipase and Trypsin

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Solution

The correct option is B Dilute Hydrochloric acid, Pepsinogen and Mucus
Dilute hydrochloric acid, pepsinogen and mucus is found in stomach.
The walls of the stomach contain three tubular glands, which secrete gastric juices; which contain dilute hydrochloric acid, the enzyme pepsinogen and mucus. The mucus protects the stomach from its own secretions, the dilute hydrochloric acid kills germs and provides an acidic medium for enzymes to act in; whereas enzyme pepsin digests proteins in the food in the acidic medium.

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Similar questions

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?

Complete the following table: [5 MARKS]

$\begin{matrix} D i g e s t i v e j u i c e s a n d e n z y m e s & S u b s t a n c e d i g e s t e d & P r o d u c t F o r m e d S a l i v a A m y l a s e G a s t r i c j u i c e P r o t e a s e (p e p s i n) a n d h y d r o c h l o r i c a c i d P a n c r e a t i c j u i c e P r o t e a s e s (t r y p s i n) L i p a s e s A m y l a s e I n t e s t i n a l e n z y m e s P e p t i d a s e s S u c r a s e L a c t a s e M a l t a s e B i l e f r o m t h e l i v e r B i l e s a l t s \end{matrix}$

Q. Choose the correct answer among the following:

(a) Gastric juice contains

(i) pepsin, lipase, and rennin

(ii) trypsin, lipase, and rennin

(iii) trypsin, pepsin, and lipase

(iv) trypsin, pepsin, and renin

(b) Succus entericus is the name given to

(i) a junction between the ileum and large intestine

(ii) intestinal juice

(iii) swelling in the neck

(iv) appendix

Q. The stomach secretes hydrochloric acid in the gastric juice. What is its function?

Q. Pick out the correct and the wrong statement.
A. The digestion of starch (carbohydrate) beings on the buccal cavity by ptyalin enzyme.
B. Protein digestion begins in the stomach.
C. Gastric lipase enzyme completely breaks down the lipids.
D. Hydrochloric acid, proteins digesting enzymes and mucus are present in the gastric juice.

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