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
[{'content': 'A 28-year-old professional cyclist has been training for an oppounity to go for a long race. His coach strongly suggests the intake of carbohydrates after the work out to ensure a muscle glycogen storage. The activity of muscle glycogen synthase in resting muscles is increased by the action of which of the following: \nSelect and explain. \nA. Epinephrine, B. Glucagon, C. Insulin, D. Phosphorylation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Insulin increases the activity of muscle glycogen synthase after the intake of carbohydrates & increases glycogen reserves in liver & muscles. Insulin is anabolic hormone, so increases the rate of the anabolic pathway - glycogenesis. Fig.: In fed state, insulin hormone is released', 'role': 'assistant'}]