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: Biochemistry
In a seriously ill patient, addition of amino acids in the diet results in a positive nitrogen balance. The mechanism for this is: 
Select and explain. 
A. Increased absorption of amino acids from the intestine, B. Enhanced rates of gluconeogenesis, C. Increased secretion of insulin, D. Increased Growth hormone secretion
C: Increased secretion of insulin
Answer: C: Increased secretion of insulin 
Explanation: C i.e. Increased secretion of insulin- Glucose, mannose, aminoacids (such as leucine, arginine, others) and f3 ketoacids such as acetoacetate (derived fromfat catabolism) stimulate insulin secretin and have protein sparing effectQ.- Insulin has anabolic effect on metabolism. It decreases protein catabolism and fat catabolism for energy production and increases aminoacid uptake & protein synthesis (positive nitrogen balance)Q.