title: Refractory nature of the chick cardiac pacemaker to thyroxin in experimental hyperthyroidism.
mesh_terms: D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000502:physiology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects*; D006352:Heart Ventricles / Q000033:anatomy & histology; D006584:Hexamethonium Compounds / Q000494:pharmacology; D006980:Hyperthyroidism / Q000503:physiopathology / Q000662:veterinary*; D007279:Injections, Subcutaneous; D008297:Male; D009929:Organ Size; D011201:Poultry Diseases / Q000503:physiopathology*; D013961:Thyroid Gland / Q000033:anatomy & histology; D013974:Thyroxine / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D006584:Hexamethonium Compounds; D013974:Thyroxine