Fig. 6. Summary of the changes in basolateral membrane potential (V_bl) and transepithelial membrane potential (V_te) in response to the addition of 6 mmol l^-1 barium observed in different bath K⁺ concentrations. The solid line indicates the normal potential profile and the dotted line indicates the potential profile in the presence of barium. Asterisks indicate significant differences (P<0.05) between mostly unpaired experiments.