Proteins that are consumed as part of the diet are digested into single amino acids, absorbed in the small intestine, and transp
orted via the portal vein to the liver. Fill in the blank about protein digestion. Proteins are denatured by hydrochloric acid in the 1. stomach
2. pancreas
3. liver
4. mouth small intestine
The digestion of protein starts in the stomach, where HCl and pepsin break proteins into smaller polypeptides, which then travel to the small intestine
