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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.
In most resting neurons, the potential difference across the membrane is about 30303030 to 90909090 mV\text{mV}mVm, V (a mV\text{mV}mVm, V is 1/10001/10001/10001, slash, 1000 of a volt), with the inside of the cell more negative than the outside.