I am taking a course on the nervous system and I am do not have any physics background. Therefore, I would like to know, what are we precisely talking about when we talk about current in the nervous system?
At the same time what are we talking about when we talk about potential (i.e membrane potential or action potential.
I once heard an analogy about waterfall and water comparing current and potential (voltage), can someone elaborate on that for me.
Also, I know that electrical activity is the flow of electrons. Therefore does that mean that passive current in an axon/nerve is a flow of electrons? And is it also a flow of electrons when we have action potential.
Thank you in advance for all the help.