title: Letter: Responsiveness of the 4-day-old embryonic chick heart to catecholamines.
mesh_terms: D000818:Animals; D002395:Catecholamines / Q000494:pharmacology*; D002642:Chick Embryo; D004298:Dopamine / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D006321:Heart / Q000187:drug effects / Q000196:embryology*; D006339:Heart Rate / Q000187:drug effects; D007545:Isoproterenol / Q000494:pharmacology; D008564:Membrane Potentials / Q000187:drug effects; D008722:Methods; D009638:Norepinephrine / Q000494:pharmacology
chemical_list: D002395:Catecholamines; D007545:Isoproterenol; D004298:Dopamine; D009638:Norepinephrine; D004837:Epinephrine