title: Influence of the length of the stimulus period and frequency of sympathetic stimulation on the response of the guinea-pig isolated vas deferens to bretylium, guanethidine and amphetamine.
mesh_terms: D000661:Amphetamine / Q000494:pharmacology*; D000818:Animals; D001949:Bretylium Compounds / Q000494:pharmacology*; D003913:Dextroamphetamine / Q000494:pharmacology*; D006145:Guanethidine / Q000494:pharmacology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008297:Male; D013564:Sympathetic Nervous System / Q000502:physiology*; D014649:Vas Deferens / Q000187:drug effects*
chemical_list: D001949:Bretylium Compounds; D000661:Amphetamine; D003913:Dextroamphetamine; D006145:Guanethidine