BIOCHEMISTRY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site glucagon The roles of glucagon and insulin A hormone secreted by the islets of Langerhans in the pancreas, which increases the concentration of glucose in the blood by stimulating the metabolic breakdown of glycogen. It is thus antagonistic to (i.e., counteracts the effects of) insulin (see antagonist). Glucagon is a 29 amino acid polypeptide. Related category    • BIOCHEMISTRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP