Question

What is the role of acid in our stomach?
A) Acidify the food for proper action of pepsin
B) Conversion of pepsinogen and prorenin into active forms of pepsin and renin
C) Killing of microorganisms present in food
D) All of the above

Answer 1

Hint: Stomach is a muscular organ which is present in the left upper side of abdomen. It is a hollow organ and has a role in digestion.

Complete answer:
The various kinds of acids found in stomach are- Hydrochloric acid, pepsinogen, mucus, various digestive enzymes, bicarbonates, and mucus.

Option A: Pepsin is present as pepsinogen in the stomach Pepsinogen is secreted by chief cells in the stomach and is an inactivated form of pepsin. In order for pepsinogen to get converted to active pepsin presence of hydrochloric acid is required.
Option B: Pepsin is present as pepsinogen in the stomach Pepsinogen is secreted by chief cells in the stomach and is an inactivated form of pepsin. In order for pepsinogen to get converted to active pepsin presence of hydrochloric acid is required.Similar to activation of inactive pepsinogen to pepsin, even prorenin is converted to renin under acidic conditions.
Option C: The acid present in food helps in killing microorganisms present in the food.
Option D: As, all of the statements are true, therefore, this is the correct option.

Thus, the correct option is (D) All of the above.

Note:The function of stomach is,
>It helps in digestion of food
>It secreted various enzymes which help in activation of other enzymes and breaking down of food
>It stores food