The right answer are mentionned in the picture.
Two antagonistic hormones, insulin and glucagon, play a key role in maintaining blood glucose levels between 0.7 and 1.0 g / L.
Insulin is a polypeptide hormone secreted by the β-cells of Langerhans (in pancreas) and exerts a hypoglycemic effect.
Glucagon is a hormone secreted by the pancreas, whose role is to stimulate the breakdown of glycogen into glucose.
