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. So colocystociain is the hormone that can also stimulate the release of glucagon into our blood. Now, let's move on to beta cells. So beta cells in our eyelids of langorgons can also basically release a peptide hormone.