title: Osmotic regulation in hydra: sodium and calcium localization and source of electrical potential.
mesh_terms: D000818:Animals; D001345:Autoradiography; D001693:Biological Transport, Active / Q000502:physiology; D002118:Calcium / Q000032:analysis*; D002127:Calcium Isotopes; D003063:Cnidaria / Q000032:analysis* / Q000502:physiology; D004594:Electrophysiology; D000431:Ethanol; D005615:Freezing; D009995:Osmosis; D012964:Sodium / Q000032:analysis*; D012975:Sodium Isotopes
chemical_list: D002127:Calcium Isotopes; D012975:Sodium Isotopes; D000431:Ethanol; D012964:Sodium; D002118:Calcium