title: A method of determining photoreceptor ion contents.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D010856:Columbidae; D005110:Extracellular Space / Q000032:analysis; D007444:Inulin; D009474:Neurons / Q000032:analysis; D010786:Photoreceptor Cells / Q000032:analysis*; D051381:Rats; D012160:Retina / Q000032:analysis; D012964:Sodium / Q000032:analysis*; D012975:Sodium Isotopes; D014316:Tritium; D014508:Urea
chemical_list: D002247:Carbon Isotopes; D012975:Sodium Isotopes; D014316:Tritium; D014508:Urea; D007444:Inulin; D012964:Sodium