I'm not a biologist, nor physicist, but there is one thing I try to understand about the elecricity inside human body. I wasn't sure whether place this question here, or perhaps on biology portal, but I consider physics to be more descriptive of the processes occuring in nature (than e.g. biology).
I always was taught about electricity to be an ordered motion of electrons - and that they are transferred from one atom to another one when electricity "happens" (which means that one atom looses its electron, but acquires a new one from the other atom instead). But after reading some science-popularizating articles on the net on human body, I found out that they mention about whole ions being moved in the human nervous system in order to transfer an electric impulse ("message" inside nervous system).
Is it really the case that whole atoms, or even bigger particles, can be involved in the electricity? Even if so, it should have been probably much slower than the electricity with electrons, or even smaller particles, I guess? Whole atoms being "mediums" for electrical charges is something new to me.