This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology metabolism, Subject name: Physiology
[{'content': 'All of the following are action of cortisol EXCEPT: \nSelect and explain. \nA. Increase blood amino acid, B. Decrease liver amino acid, C. Decrease blood amino acid, D. Increase liver amino acid', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Decrease blood amino acidRef:Berne & Levy's physiology, 5th ed. / 909 and chapter 20: Lange medical physiology by Ganong 23rd ed.* Cortisol raises the free amino acids in the serum. It does this by inhibiting collagen formation, decreasing amino acid uptake by muscle, and inhibiting protein synthesis.* Glucocorticoids promote protein degradation and inhibit entry of amino acids in tissues (Primarily Branch chain amino acids).* Glucocorticoids also lead to utilization of amino acids by promoting gluconeogenesis directly and by permissive effect on Growth hormone.", 'role': 'assistant'}]