autores Adriano Fregonesi André Sampaio Pupo Edson Antunes Gilberto de Nucci José Britto Júnior Rafael de Morais Campos
palavras-chave 6-nitrodopamine Catecholamines Idazoxan Pre-synaptic adrenoceptors Tetrodotoxin Vas deferens atropine indomethacin nitrocatecholamines reserpine synergism