A potential difference AY exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 2.30 x 10"" J of work is required to eject a positive potassium ion (K) from the interior of the cell, what is the magnitude of the potential difference (in millivolts) between the inner and outer surfaces of the cell? Macmillan Learning 14375 JAVI = mV Incorrect