And we extract these high energy electrons into this area here. At the same time, we also regenerate those NAD plus molecules needed for glycolysis and the citric acid cycle to actually continue taking place. Now, the Fadh two molecules produced in the citric acid cycle are actually taken by protein complex two. Now, once these high energy electrons are extracted, they begin to move along the proteins of the inner membrane of the mitochondria. And from basic physics, we know that whenever electrons flow from .1 to .2, the flow of that electron or the flow of the electrons creates an electrical current. And that electrical current can be used to carry out some process.