As the body progresses from the absorptive to postabsorptive state only the 55/

55.   As the body progresses from the absorptive to postabsorptive state only the __________
   continues to burn glucose while every other organ in the body switches to fatty acids.

   a.   liver
   b.   brain
   c.   pancreas   
   d.   spleen

56.   Which of the following is most correct?

   a.   Most of the ATP are produced by substrate-level phosphorylation.
   b.   Oxidation of FADH2 yields four ATP via oxidative phosphorylation.
   c.   Glycolysis relies on substrate-level phosphorylation for the four ATP produced in
      this pathway.
   d.   Most of the ATP are produced directly in the Krebs cycle.