title: Intracellular potassium and chloride activities in frog heart muscle.
mesh_terms: D000818:Animals; D001001:Anura; D002712:Chlorides / Q000032:analysis*; D006325:Heart Atria / Q000032:analysis; D006352:Heart Ventricles / Q000032:analysis; D008433:Mathematics; D008564:Membrane Potentials; D008722:Methods; D008839:Microelectrodes; D009206:Myocardium / Q000032:analysis*; D011188:Potassium; D011189:Potassium Chloride; D011199:Potentiometry; D012834:Silver; D012964:Sodium / Q000032:analysis*
chemical_list: D002712:Chlorides; D012834:Silver; D011189:Potassium Chloride; D012964:Sodium; D011188:Potassium