title: The developing electrolytes concentrations of inner ear fluids in guinea pigs.
abstract: Cochlear endolymph, scala tympani perilymph, and scala vestibuli perilymph were collected from fetal, neonatal, and mature guinea pigs. The concentrations of Na and K in these fluids were then assessed using a microflame photometer. The electrolyte composition in the endolymph was already characterized by a high concentration of K and a low concentration of Na by the 49th day of gestation.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism; D004710:Endolymph / Q000032:analysis; D005260:Female; D005333:Fetus / Q000378:metabolism; D006168:Guinea Pigs / Q000378:metabolism*; D007761:Labyrinthine Fluids / Q000032:analysis*; D010498:Perilymph / Q000032:analysis; D011188:Potassium / Q000032:analysis*; D011247:Pregnancy; D012964:Sodium / Q000032:analysis*
chemical_list: D012964:Sodium; D011188:Potassium