Describe the pathway for protein degradation in the GI
Protein enters the stomach where it is broken down by HCl and pepsin and broken down into peptides. These peptides enter the small intestines where it is greeted by the following secretions from the pancreas: HCO3-, tripsinogen, chymotrypsinogen, proelastase, procarboxypeptidases A and B. These secretions turn the peptides into aminopeptidases, di-peptides and tri-peptides and amino acids. All of these are absorbed by the intestinal epithelial cells, broken down into amino acids and released into the blood stream.