Complex metabolism

about a month left for my exam, once again same old chapter that i love to study but hard to cram. digestion of glucose to its assimilation, regulation and formation with in the body. Though it's sound interesting and easy but the pathway of all of the above mentioned processes are hard. and i wonder how the body acts as the machine where degradation and formation of same substances are going on without hindering these coupled biochemical reaction. It's abouit the simple sugar there are lot more of the subsubtance that participate in the biochemical reaction within the body of human being. It's amazing to study those facts.