Question

explain the process of digestion of proteins in stomach and small intestine

Answer 1

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★IN STOMACH : Digestion of protein starts in stomach with the help of enzyme pepsin. Pepsin is secreted in inactive form pepsinogen by the chief cells present in stomach. Hydrochloric acid secreted by parietal cell in stomach activates pepsinogen into pepsin.
Pepsin then hydrolysed the protein molecules and converts them into proteoses, peptones and larger peptides.
Then the food moves into small intestine where protein digestion remains continued.




★IN SMALL INTESTINE: pancreatic juice contains inactive proteases named as chymotrypsinogen, trypsinogen and procarboxypeptidase.
Trypsinogen in small intestine is activated into trypsin by the action of enterokinase (found in the lining of small intestine). Activated trypsin then converts chymotrypsinogen into chymotrypsin and procarboxypeptidase into carboxypeptidase.
Activated chymotrypsin then hydrolyse the proteones and larger peptides into smaller peptides such as dipeptides and tripeptides.  Whereas carboxyppetidase hydrolyse the peptide chains from their carboxyl ends and converts them into amino acids.
The dipeptides and tripeptides are breakdown into amino acids with the help of enzymes dipeptidases and tripeptidases secreted in the intestinal juice.
Finally, the digested proteins enter into larger intestine for absorption.


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Answer 2

☺️!!Hello!!☺️

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✨The digestion of proteins begins in the stomach and is completed in the small intestine.

✨The digestive juice secreted in the gastric glands present on the stomach walls is called gastric juice.

✨The food that enters the stomach becomes acidic on mixing with this gastric juice.

✨The main components of gastric juice are hydrochloric acid, pepsinogen, mucus, and rennin.

✨Hydrochloric acid dissolves the bits of food and creates an acidic medium so that pepsinogen is converted into pepsin.

✨Pepsin is a proteolytic enzyme.

✨It is secreted in its inactive form called pepsinogen, which then gets activated by HCL.

✨The activated pepsin then converts proteins into proteases and peptides.

✨Rennin is a proteolytic enzyme, released in an inactive form called prorennin.

✨ Rennin plays an important role in the coagulation of milk.

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