Sina-73

Dear all lovers of physiology! I've been at a class of physiology yesterday around the topic "Chemo-physical aspects of how an action potential is done". The instructor said that there's a current of charges and another, current of ions. While 'charge current' precedes the 'ions current'. I didn't understand the meaning, although I asked him several times, still didn't find out the concept! Is anyone here can help me through this confusion?! Wishes, Sina