Explanation:This question was inspired by Becky Peel of the University of Cambridge.Electrochemical physiology is further explored, and a method to investigate it is analysed.The trace would simply be flipped upside down, since it is arbitary which electrode is measured relativeto which.The + electrode forces a patch of PM to be stuck in a polarised state (+ on the outside), which preventsaction potentials passing this point. (making this patch of membrane more hyperpolarised will not triggeran AP here).There is no inherant directionality to an axon, and the described mechanism does not dictate one.The described mechanism generates all or nothing APs.