The absence of a significant histamine receptor reserve in vascular smooth muscle.
D000818:Animals; D001011:Aorta / Q000187:drug effects*; D006632:Histamine / Q000494:pharmacology*; D066298:In Vitro Techniques; D009130:Muscle, Smooth / Q000187:drug effects*; D010643:Phenoxybenzamine / Q000494:pharmacology; D011817:Rabbits; D011955:Receptors, Drug
D011955:Receptors, Drug; D010643:Phenoxybenzamine; D006632:Histamine