Verapamil diminished just the norepinephrine or urotensin II induced contraction from the existence of extracellular Ca2+, with little if any change while in the contraction in Ca2+-free buffer. The urotensin I induced relaxation response in aortic strips contracted by 40 mM KCl was Increased by pretreatment with papaverine or forskolin. https://urotensin-i-acetate36776.win-blog.com/16881335/neuropeptide-an-overview