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NBME 21 Answers
A healthy 25-year-old man is participating in a ...
I want to re-emphasize something that @assoplasty has already stated :).
The Q-stem states serum glucose = 100, and the Q asks why the patient is able to maintain normoglycemia.
Therefore, you can immediately eliminate choices A and C because acetoacetate and beta-hydroxybutyrate are sources of energy during ketogenesis -- ketogenesis does not provide glucose energy sources.
@frimmy_11 Why would protein break down after only 20 hours? Shouldn’t fat be the major contributor now? Also, if protein is being used, then why isn’t valine the choice? Valine is also glucogenic.