Compute Vm using the G - H - K equation in the following scenarios: PK + : PNa + : PCI- = 1: 0.04 0.05 and in the case where PK + : PNa + : PCI. 1:20:0.45 . The first scenario approaches the case for a membrane at rest, the latter is that for a membrane at the peak of the action potential. What do you conclude from these values about the relation between Vm and ion permeability?