That ultimately not only cleaves peptide bonds but it also activates many other proteolytic enzymes in our digestive system. Now let's discuss the three important types of hormones that are produced by the small intestine and which actually stimulate the process of digestion. Let's begin with a peptide hormone known as secretin. So secretin is yet another peptide hormone that is released by our exocring, by our glands found in the small intestine. And what Secretin basically does is it stimulates the pancreas to release the pancreatic juice which consists of many proteolytic enzymes as we'll see in just a moment. Now another type of peptide hormone that is released by the small intestine is CCK which stands for Colocysticina.