This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Increased glycolysis and decreased gluconeogenesis 
Select and explain. 
A. Insulin, B. Glucagon, C. Epinephrine, D. Coisol
A: Insulin
Answer: A: Insulin 
Explanation: Insulin helps control blood glucose levels by signaling the liver and muscle and fat cells to take in glucose from the blood. Insulin therefore helps cells to take in glucose to be used for energy. If the body has sufficient energy, insulin signals the liver to take up glucose and store it as glycogen. Ref: guyton and hall textbook of medical physiology 12 edition page number:610,611,612