Here is a link to a great lecture describing the metabolic processes that the body uses to supply fuel both during fasting and in the fed state. Great reading and helps to understand how all the different processes are integrated together.
http://www.tamu.edu/faculty/bmiles/lect ... ration.pdf
Warning: contains biochemistry! (It is at around A-level/university biology level I would guess...I certainly remember doing this stuff during my degree anyway)
http://www.tamu.edu/faculty/bmiles/lect ... ration.pdf
Warning: contains biochemistry! (It is at around A-level/university biology level I would guess...I certainly remember doing this stuff during my degree anyway)