title: Bioassay of acetylcholine on the sinus venosus of the frog.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism* / Q000494:pharmacology; D000818:Animals; D001001:Anura; D001285:Atropine / Q000494:pharmacology; D001681:Biological Assay; D004562:Electrocardiography; D004837:Epinephrine / Q000494:pharmacology; D006321:Heart / Q000187:drug effects* / Q000502:physiology*; D010830:Physostigmine / Q000494:pharmacology; D013696:Temperature
chemical_list: D001285:Atropine; D010830:Physostigmine; D000109:Acetylcholine; D004837:Epinephrine