GK: How about when thinking is forming neural pathways? are pathways made by electrons? > > No, ions. > Not that simple ... ions have electrons in them. All chemical reactions ultimately can be viewed as electron transfer. But the ions interact with organic biomatter. -When I take a hammer to a rock and break it ... it can be viewed as a chemical reaction. In the same way if I give nitrogycerine a good shake ... a chemical reaction ensues.-Synapse