title: The morphological basis for the sympathetic control of blood vessels.
mesh_terms: D000818:Animals; D001345:Autoradiography; D008854:Microscopy, Electron; D009469:Neuromuscular Junction / Q000166:cytology*; D009638:Norepinephrine / Q000378:metabolism*; D051381:Rats; D012377:Rodentia; D009435:Synaptic Transmission; D014666:Vasomotor System / Q000166:cytology*
chemical_list: D009638:Norepinephrine