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Using the information from a standard reduction potentials table (see link below), the standard cell potential for the zinc/lead cell is then: EÂºcell = EÂºcathode - EÂºanode = -0.13 - (- 0.76) = 0.63 V.
where Vin is the potential on the inside of the cell and Vout the potential on the outside. The membrane potential of a cell at rest is called the resting membrane potential. Since, by convention, the potential outside the cell is defined as zero, the. resting potential (Vr) is equal to Vin. Its usual range in neurons is -60 mV to -70 mV. All electrical signaling involves brief changes from the resting membrane. potential due to alterations in the flow of electrical current across the cell membrane resulting from the opening and closing of ion channels.