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Mean tension (g) of (A) ruminal artery (RA), (B) ruminal vein (RV), (C) mesenteric artery (MA), and (D) mesenteric vein (MV) exposed to the reference dose of 120 mM KCl using blood vessel cross-sections that were previously exposed to 0, 0.01, or 1 µM ergovaline for 2 h (incubated) and compared to those blood vessels that were not incubated before the myograph experiment.
