This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: nutrition and digestion, Subject name: Biochemistry
All of the following are seen after 24 hours of fasting except 
Select and explain. 
A. Lipolysis, B. Muscle break down, C. Hepatic gluconeogenesis, D. Blood glucose concentration is maintained
D: Blood glucose concentration is maintained
Answer: D: Blood glucose concentration is maintained 
Explanation: The muscle releases mainly alanine and glutamine of which alanine is taken up by liver and glutamine by kidneys (Fig. 14.4). Liver removes the amino group and conves it to urea and the carbon skeleton is used for gluconeogenesis. Students should also refer glucose-alanine cycle, in Chapter 9, under gluconeogenesis (Fig. 9.30). The brain predominantly takes up branched chain amino acids.Ref: DM Vasudevan, page no: 174