Figure 4.

Current–voltage relations obtained in isolated smooth muscle from rat mesenteric small arteries. (a) I/V relation under control conditions, in the presence of 150 μM heptanol and in the presence of 150 μM heptanol and 100 nM iberiotoxin. (b) I/V relation under control conditions, in the presence of 150 μM heptanol and in the presence of 500 μM heptanol. (c) I/V relation under control conditions, in the presence of 30 μM 18α-glycyrrhetinic acid and in the presence of 100 μM 18α-glycyrrhetinic acid. (d) I/V relation under control conditions, in the presence of 10 μM 18β-glycyrrhetinic acid and in the presence of 30 μM 18β-glycyrrhetinic acid.