title: Membrane current changes related to Na-Ca exchange diffusion in the bullfrog atrial muscle.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D006325:Heart Atria; D066298:In Vitro Techniques; D007474:Ion Exchange; D008564:Membrane Potentials / Q000187:drug effects; D009200:Myocardial Contraction / Q000187:drug effects*; D011892:Rana catesbeiana; D012964:Sodium / Q000494:pharmacology*
chemical_list: D012964:Sodium; D002118:Calcium