title: Membrane calcium current in cardiac excitation: effects of ATP and related substances and sodium pump on bullfrog atrium.
mesh_terms: D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000818:Animals; D001001:Anura; D016275:Atrial Function; D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism*; D006160:Guanosine Triphosphate / Q000494:pharmacology; D006321:Heart / Q000502:physiology*; D006325:Heart Atria / Q000187:drug effects; D007700:Kinetics; D008564:Membrane Potentials / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism*; D011188:Potassium / Q000494:pharmacology; D011892:Rana catesbeiana; D012964:Sodium / Q000378:metabolism*
chemical_list: D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate; D012964:Sodium; D011188:Potassium; D002118:Calcium