DPP-4 degrades a peptide named for this hormone; that peptide is secreted by L-cells in the intestine.
A beta-blocker overdose can be treated by using an IV infusion of this hormone. A tumor producing
 this hormone causes necrolytic migrating erythema, and such a tumor can be controlled with octreotide.
 DPP-4 degrades a peptide named for this hormone; that peptide is secreted by L-cells in the intestine. This
 hormone acts through a cAMP-mediated mechanism via a G-protein coupled receptor, and leads to the
 activation of glycogen phosphorylase in the liver and the breakdown of glycogen. This hormone is secreted
 by the alpha cells of the Islets of Langerhans in the pancreas. For 10 points, name this hormone that
 opposes insulin by raising blood sugar levels.
A beta-blocker overdose can be treated by using an IV infusion of this hormone.
{glucagon}