title: Function of sympathetic nerves in blood vessels.
mesh_terms: D001158:Arteries / Q000294:innervation; D009130:Muscle, Smooth / Q000294:innervation; D009638:Norepinephrine / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology; D013566:Sympathomimetics; D009435:Synaptic Transmission
chemical_list: D013566:Sympathomimetics; D009638:Norepinephrine