Describe how protein are digested as they move through the alimentary canal of a human being

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Protein digestion begins in the stomach. Step 1: In the stomach, hydrochloric acid (HCl) denatures proteins, unfolding their complex structures. HCl also activates the enzyme pepsinogen into its active form, pepsin. Step 2: Pepsin then breaks down large protein molecules into smaller polypeptide chains. Step 3: These polypeptides move into the small intestine. Here, enzymes like trypsin and chymotrypsin, secreted by the pancreas, further break down the polypeptides into even smaller peptides. Step 4: Finally, enzymes called peptidases (e.g., dipeptidases, aminopeptidases) located on the brush border of the small intestine's lining break down these smaller peptides into individual amino acids. Step 5: These amino acids are then absorbed through the walls of the small intestine into the bloodstream and transported to cells throughout the body for assimilation.

Describe how protein are digested as they move through the alimentary canal of a human being

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Step-by-step solution

In the stomach, hydrochloric acid (HCl) denatures proteins, unfolding their complex structures.

Pepsin then breaks down large protein molecules into smaller polypeptide chains.

These polypeptides move into the small intestine.

Finally, enzymes called peptidases (e.g., dipeptidases, aminopeptidases) located on the brush border of the small intestine's lining break down these smaller peptides into individual amino acids.

These amino acids are then absorbed through the walls of the small intestine into the bloodstream and transported to cells throughout the body for assimilation.

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