where does protein chemical digestion begin?
The stomach starts to digest protein. It is the holding tank to prevent overwhelming of absorbability. Secretes gastric juices (enzymes & acid). Formation of chyme (pulpy acidic fluid that passes from the stomach to the small intestine, consisting of gastric juices and partly digested food). Secretes intrinsic factor (B12 absorption). The stomach acid activates digestive enzymes (Pepsin), partially digests dietary protein (denaturation).