Fig. 9. [K⁺]_in, [Na⁺]_in, and [Cl^-]_in, membrane potential (U) and cell volume (V/A) calculated for model cells with parameters similar to those of U937 cells. In the balance state (t<0), in mM [Na⁺]_in 38, [K⁺]_in 147, [Cl^-]_in 45, V/A 12.50, pNa 0.00382, pK 0.022, pCl 0.0091; Gram is added at t=0 and pNa, pK are set 0.1 (dotted lines with symbols) or 0.2 (solid lines). The other parameters remain unchanged. Dashed lines indicate [Na⁺]_out, [K⁺]_out (A) and the initial parameters (B, C). Cell volume is given in mL per mmol of impermeant intracellular anions (V/A).