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: Biochemistry
[{'content': 'Which one of the following is present intracellularly in muscle cells? \nSelect and explain. \nA. Insulin, B. Coicosteroid, C. Epinephrine, D. Glucagon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Glucocoicoids (GCs) exe key metabolic influences on skeletal muscle.GCs increase protein degradation and decrease protein synthesis.The released amino acids are mobilized from skeletal muscle to liver, where they serve as substrates for hepatic gluconeogenesisRef: DM Vasudevan, 7th edition, page no: 664, 665', 'role': 'assistant'}]