The model cell reaches a single physiologically reasonable steady state that is independent of the initial values of any modeled variable. All variables are plotted on the left-hand scales, except for the potential across the t-system access resistance (E_A, broken line), which is plotted on the right-hand scale. The model was initiated using physiological parameters (Table I), but with two sets of intracellular ion concentrations that were chosen to be markedly different from each other and clearly unphysiological, although fulfilling a constraint of bulk electroneutrality in each compartment. See Table II below for a summary of the initial and steady-state values of the major modeled variables.