Question

The amount of gastric juice secreted per day from man’s stomach is about
A. 500 ml to 800 ml
B. 1200 ml to 1500 ml
C. 100 ml to 500 ml
D. 10 ml to 15 ml

Answer 1

Hint:
> Gastric juice is secreted by the glands which are present in the mucous membrane of the stomach.
> It is a thin watery acid digestive fluid which helps in digestion of foods.
> Its main work is to inactivate the microorganisms which are swallowed with the food.
> By inactivation of microorganisms it will inhibit the infectious agents from reaching to the intestine.
> In normal conditions the color of gastric juice is clear.

Complete answer:
Gastric juice is made up by the digestive enzymes (pepsin and rennin), hydrochloric acid and mucus.
The main component of gastric juice is hydrochloric acid which is produced by parietal cells in the gastric glands in the stomach.
In a normal person gastric mucosa secretes 1200 to 1500 ml of gastric juice per day. This amount of gastric juice is sufficient to make food particles soluble, initiation of the digestion of protein, and formation of the chyme. These actions subsequently result in the digestion of the food we eat.

Thus the correct answer is- The amount of gastric juice secreted per day from man’s stomach is about 1200 ml to 1500 ml, i.e option (B).

Note:
> Gastric juice contains HCl and pepsin which can kill the bacteria within 15 min. Gastric juice has a pH of less than 3.0.
> If the pH will increase more than 4.0 then overgrowth of bacteria can occur.
> The low pH of gastric juice can damage the stomach so to secure the outer layer a large amount of mucus is secreted.