title: Effects of intracellular injection of Na +  on the light response in Limulus central photoreceptors.
mesh_terms: D000818:Animals; D003386:Brachyura; D002118:Calcium / Q000378:metabolism; D007267:Injections; D007478:Iontophoresis; D010786:Photoreceptor Cells / Q000187:drug effects* / Q000502:physiology; D011188:Potassium / Q000378:metabolism; D012964:Sodium / Q000494:pharmacology*; D013328:Strophanthins / Q000494:pharmacology
chemical_list: D013328:Strophanthins; D012964:Sodium; D011188:Potassium; D002118:Calcium