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Cell voltage. The standard electrical potential of a cell can be determined by the use of a standard potential table for the two half cells involved. The first step is to identify the two metals reacting in the cell. Then one looks up the standard electrode potential, E0, in volts, for each of the two half reactions.
1 the resting membrane potential of a cell is determined by the net flow of ions through the leak channels that are open in the resting state.2  the exact proportions and nature of the ion channels varies from cell to cell, and therefore, so does the RMP. the resting membrane potential of a cell is determined by the net flow of ions through the leak channels that are open in the resting state.