Figure 4. Vasorelaxation produced by 10-8–10-4 M T3 in phenylephrine (PE)-precontracted rat aortic rings. Assays were carried out to test the effect of: A, 3.1×10-7 M glibenclamide, B, 10-3 M 4-aminopyridine (4-AP), C, 10-2 M tetraethylammonium (TEA), and D, 10-7 M apamin plus 10-7 M charybdotoxin (APA+CHAR). Data are reported as means±SE (n=8). *P<0.05 vs control (two-way ANOVA).
