title: [Difference in vasoconstrictor responses of the internal and external carotid arteries to norepinephrine].
mesh_terms: D000818:Animals; D002342:Carotid Artery, External / Q000502:physiology*; D002343:Carotid Artery, Internal / Q000502:physiology*; D004285:Dogs; D066298:In Vitro Techniques; D009638:Norepinephrine / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D010656:Phenylephrine / Q000494:pharmacology; D014661:Vasoconstriction / Q000187:drug effects*; D014700:Verapamil / Q000494:pharmacology
chemical_list: D010656:Phenylephrine; D014700:Verapamil; D009638:Norepinephrine