title: Concentration gradient of Na +  and K +  ions in outer segments of retinal rods.
mesh_terms: D000255:Adenosine Triphosphate / Q000494:pharmacology; D000818:Animals; D001001:Anura; D001693:Biological Transport, Active / Q000187:drug effects; D002417:Cattle; D005110:Extracellular Space / Q000032:analysis; D066298:In Vitro Techniques; D010042:Ouabain / Q000494:pharmacology; D010743:Phospholipids / Q000032:analysis; D010786:Photoreceptor Cells / Q000032:analysis* / Q000378:metabolism; D011188:Potassium / Q000032:analysis* / Q000378:metabolism; D012964:Sodium / Q000032:analysis* / Q000378:metabolism
chemical_list: D010743:Phospholipids; D010042:Ouabain; D000255:Adenosine Triphosphate; D012964:Sodium; D011188:Potassium