Question

glycogenolysis is stimulated by which of the following?

o glucagon and epinephrine
o insulin and norepinephrine
o epinephrine and calcitonin
o insulin and glucagon

Explanation:

Glycogenolysis is the breakdown of glycogen into glucose - 1 - phosphate and glucose. Glucagon is released when blood glucose levels are low and stimulates glycogenolysis in the liver. Epinephrine (adrenaline) is released during the fight - or - flight response and also stimulates glycogenolysis in both liver and muscle. Insulin promotes glucose uptake and storage as glycogen, so it does not stimulate glycogenolysis. Calcitonin is involved in calcium regulation and not related to glycogenolysis.

Answer:

A. Glucagon and epinephrine