When blood glucose levels decrease, Your liver which is a glycogen storage converts glycogen to glucose and releases it into circulation. Further energy ( ATP Molecules ) is obtained by the TCA Cycle with subtraces like Fat and Protein.
The diagram is weird. Sorry I cant answer
Come up with a different one.. or see what do you did wrong in the first one ( I think .)
Vary in the number of neutrons but Sama in the number if protons are called isotopes
