what is the biological significance of pepsin
It's secreted by specialized cells in the lining of the stomach called chief cells, explains Dr. Lauralee Sherwood in her book Human Physiology.. Pepsin itself is a protein, but in contrast to the proteins that you eat and digest, pepsin has biological activity in the stomach.ells in the stomach secrete pepsin to help you digest the protein that you consume in food. Specialized cells in the intestine then absorb the digestion products of the protein into the bloodstream, and your cells take them up from there.