Figure 5.

Influence of 500 μM ouabain on the hyperpolarization of endothelial cells from rat aorta produced by ionomycin. (a) Original tracing of an experiment showing the influence of ionomycin (0.6 μM) on the membrane potential of endothelial cells. (b) Original tracing of an experiment showing the influence of 500 μM ouabain on the hyperpolarization of endothelial cells produced 0.6 μM ionomycin. (c) Graphical representation of the time dependency of the effect of 500 μM ouabain on the mean changes in membrane potential evoked by 0.6 μM ionomycin. The changes in membrane potential were calculated as the difference between the membrane potential values before and after ionomycin administration. Numbers associated with bar plot indicate the number of aorta preparations.