This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
In a seriously ill patient, addition of amino acids indiet results in a positive nitrogen balance. The mechanism for this is : 
Select and explain. 
A. Increased Growth hormones secretion, B. Enhanced rate of gluconegenesis, C. Increased absorption of amino acids from diet, D. Increased secretion of Insulin.
D: Increased secretion of Insulin.
Answer: D: Increased secretion of Insulin. 
Explanation: Increased secretion of insulin Amino acid diet (paicularly arginine & lysine) stimulate insulin release which has anabolic effect on metabolism. It decreases protein catabolism .for energy and increases amino-acid uptake & protein synthesis.