Review where digestive processes of protein occur. Select the letter that indicates where transport proteins move the products of protein digestion into the mucosal cell.

Question

Quizplus · Accepted Answer

Protein digestion begins in the stomach (A) where the acidic pH and protein-digesting enzymes called proteases start breaking down proteins. The partially digested proteins then move to the small intestine where additional proteases from the pancreas and small intestine complete the breakdown (B). The products of protein digestion, such as amino acids, dipeptides, and tripeptides, are then transported across the mucosal cell membrane (C) with the help of transport proteins located on the brush border of the mucosal cells. These transport proteins are responsible for moving the products of protein digestion from the lumen of the small intestine (where digestion occurs) into the mucosal cell (D). Thus, the correct answer is D.

Review Where Digestive Processes of Protein Occur