The cell in a slightly negative charge inside cell and if we measure this with the voltmeter we end up with a charger negativesninety mill volts rain or so you Alpha XTRM know this - mill volts I am is ohm actually you know this is sort of the average are resting potential on cells but it can vary from cell to cell and from moment to moment and then we talked a little about that in the nervous system how you can arm can inhibit I action potentials by I'm by hyperpolarizing the membrane.