And when the concentration of glucose increases to a certain amount, that can basically inhibit the release of glucagon into our blood. Now, glucagon is also inhibited by other proteins, by other enzymes, for example, insulin, as well as somatostatin. And we'll discuss these in just a moment. Now, we said that glucagon is stimulated by low concentrations of glucose. It can also be stimulated by other protein, by other hormones. For example, it's stimulated by CCK, which is a hormone that stands for Cola Cystic Iin.