All of the following can stimulate the activity of muscle glycogen phosphorylase EXCEPT
A) calcium ions.
B) epinephrine.
C) cyclic AMP.
D) phosphorylase kinase.
E) glucagon.

Question

Quizplus · Accepted Answer

Glucagon primarily affects liver glycogen phosphorylase to stimulate glycogen breakdown in the liver, not in muscle. Muscle glycogen phosphorylase is activated by calcium ions, epinephrine, cyclic AMP, and phosphorylase kinase, but not directly by glucagon.

All of the Following Can Stimulate the Activity of Muscle