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Question
What substances are contained in gastric juice? What are their functions?
Solution
The gastric juice contains hydrochloric acid, pepsin enzyme and mucus. Their functions are as follows:-
1) Hydrochloric acid: It creates an acidic environment for the action of pepsin as well as kills the bacteria present in the food.
2) Pepsin: It begins the digestion of proteins into smaller molecules.
3) Mucus: It protects the stomach wall from hydrochloric acid.
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