title: Membrane potentials of frog sartorius muscle fibers, in which potassium ions were replaced by sodium.
mesh_terms: D000818:Animals; D001001:Anura; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009132:Muscles / Q000502:physiology*; D011188:Potassium / Q000494:pharmacology*; D011199:Potentiometry; D012964:Sodium / Q000494:pharmacology*
chemical_list: D012964:Sodium; D011188:Potassium