Question

The HCl acid secreted by gastric glands creates an acidic medium which facilitate the action of enzyme pepsin
true and false​

Answer 1

Required Answer:-

The above statement is:

• True

HCl is released by the oxyntic or parietal cells of the stomach which provides an acidic medium for the activation of Inactive Pepsinogen enzyme to Pepsin.

It also helps in the deactivation of salivary amalyse present in the food as it enters the buccal cavity. It also helps in killing the germs and bacteria present in food.

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The different cells present in the lining of stomach secrets different enzymes and hormones. Like$:$

1) Zymogen or peptic cells (Inactive enzymes):

• Pepsinogen
• Renin (In infants)
• Gastric amlyase
• Gastric lipase

2) Oxyntic cell:

• HCl (Provides acidic medium)
• CIF (Castral Intrinsic factor)

3) Gastric cells:

• Gastric gormone (Stimulate the gastric gland).

4) Argentaffin cells:

• Histamine
• Seretonin
• Somatostatin

5) Goblet cells:

• Mucous (To save the stomach lining from the excess acid released by the Oxyntic cells).

Answer 2

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True

Pepsinogen(zymogen) secreted by gastric gland is converted into pepsin(enzyme) in the presence of HCl(hydrochloric acid).

Pepsin digests protein by conversion of protein into proteases and peptides.

HCl also kills bactaria which could be harmful and protect our body from infections.

HCl is secreted in the lumen by oxyntic or paraital cells of mucosa.