Figure 2. (A) and (B) Effects of thiopental (+THIO, 0.3 mM, n = 12) and etomidate (+ETO, 0.3 mM, n = 7) on the NG-nitro-L-arginine/diclofenac-resistant relaxant response to acetylcholine (ACh). (C) and (D) Effects of thiopental (+THIO, 0.3 mM) on the relaxant response to 3 micro Meter glyceryl trinitrate (GTN, n = 5) and SNP sodium nitroprusside (0.1 micro Meter, n = 5) in segments treated with NG-nitro-L-arginine (*P < 0.05, **P < 0.01 vs. control; ns, not significant).