Spread of excitation and injected current in the tunicate myocardium.
D000109:Acetylcholine / Q000494:pharmacology; D000200:Action Potentials; D000818:Animals; D002816:Chordata, Nonvertebrate; D004594:Electrophysiology; D004837:Epinephrine / Q000494:pharmacology; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology; D009119:Muscle Contraction; D009206:Myocardium; D009431:Neural Conduction; D010828:Physiology, Comparative
D000109:Acetylcholine; D004837:Epinephrine