Hi all - I'm preparing a presentation that includes circuit diagram stuff, and it's been a very long time since I've done any of that. For this circuit, http://alford.bios.uic.edu/Images/586 images/circuit model (i.e. a circuit model of an isolated patch of cell membrane), I read that "there can be no net current flow between the outside and inside, and the current across the parallel circuit components sums to zero" (paraphrasing). First, is that right? If so, is it right at all times, or is it averaged over a long time? Can charge momentarily accumulate at the outside or inside? Many thanks. Happy to clarify if I've made anything unclear.