title: The negative chronotropic effect of adenine derivatives and acetylcholine on frog and rat hearts.
mesh_terms: D000009:Abdominal Muscles / Q000294:innervation; D000109:Acetylcholine / Q000494:pharmacology*; D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000818:Animals; D001001:Anura; D001285:Atropine / Q000494:pharmacology*; D006329:Heart Conduction System / Q000187:drug effects*; D006339:Heart Rate / Q000187:drug effects*; D009132:Muscles / Q000294:innervation; D051381:Rats; D009435:Synaptic Transmission / Q000187:drug effects
chemical_list: D001285:Atropine; D000255:Adenosine Triphosphate; D000109:Acetylcholine