So if I want to move my hand back and forth, my skeleton muscle produces the ATP V glycolysis to allow that voluntary movement. Now, what about liver cells? Well, liver cells have a much more complex biochemical row. And what that means is they not only use the glycolysis to produce ATP molecules that the liver cells actually need to survive, but the liver also has to do things like maintain the glucose levels in our blood. If the levels are too high, uptake that glucose and transform it into glycogen. If the levels are too low, break down that glycogen and release the glucose into our bloodstream so that the other cells of our body can essentially use that glucose to form ATP molecules.