This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Four Formulas, Subject name: Biochemistry
Glycogenolysis is activated in muscles due to: 
Select and explain. 
A. Glucagon, B. Insulin, C. Epinephrine, D. Growth hormone
C: Epinephrine
Answer: C: Epinephrine 
Explanation: Glycogenolysis is activated by glucagon & epinephrine But Glucagon receptors are not found in muscles. So epinephrine increases glycogenolysis in muscles.