Final answer:
The resting potential of K+ is approximately -70mV.
Step-by-step explanation:
The resting potential of K+ is approximately -70mV.
With the ions distributed across the membrane at these concentrations, the difference in charge is measured at -70 mV, the value described as the resting membrane potential. The exact value measured for the resting membrane potential varies between cells, but -70 mV is most commonly used as this value. Leakage channels allow Na+ to slowly move into the cell or K* to move out, and the Na*/K* pump restores them. Each ion plays a role in maintaining the membrane potential.