Figure 1.

Effect of heptanol on membrane potential, cell input resistance and tension. (a) Original recordings of simultaneous measurements of membrane potential and isometric tension in isolated mesenteric small arteries activated with noradrenaline (NA). (b) Bars illustrate the reversibility of heptanol responses on membrane potential and tension: arteries (n=4) were stimulated with NA, superfused with 150 and 500 μM heptanol, rinsed for 20 min and stimulated with NA again. No significant difference between first and second NA stimulation was found. (c) Original recordings of the effects of heptanol on membrane potential and cell input resistance (rapid deflections) in isolated mesenteric small arteries under resting conditions. Heptanol was present as indicated. Note the change in time scale.