Membrane potential and contraction of vascular smooth muscle (portal vein) during application of noradrenaline and high potassium, and selective inhibitory effects of iproveratril (verapamil).
D000818:Animals; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects*; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology*; D009638:Norepinephrine / Q000494:pharmacology*; D011169:Portal Vein; D011188:Potassium / Q000494:pharmacology*; D014700:Verapamil / Q000494:pharmacology*
D014700:Verapamil; D011188:Potassium; D009638:Norepinephrine