title: On the time course of extracellular ion concentration changes in frog atrium [proceedings].
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000378:metabolism; D005110:Extracellular Space / Q000378:metabolism; D006325:Heart Atria / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism
chemical_list: D011188:Potassium; D002118:Calcium