Verapamil diminished only the norepinephrine or urotensin II induced contraction while in the existence of extracellular Ca2+, with little if any alter during the contraction in Ca2+-free buffer. The urotensin I induced rest reaction in aortic strips contracted by forty mM KCl was enhanced by pretreatment with papaverine or forskolin. https://douglasp988eqb2.signalwiki.com/user