Fig. 6. Slow response of basolateral membrane potential (V_bl) to different bathing K⁺ concentrations in the presence of glibenclamide (Glib.) and Ba²⁺. The depolarization of V_bl when changing the [K⁺] from 5 mmol l^-1 to 140 mmol l^-1 is no longer followed by a repolarization (n=6).