近球小管 远曲小管 集合管 10%Na+卜cI Nat ht 65-70%Na+ 最低渗 Na 等渗 Cho K+ Na+ h N 醛固醇 K Cl H20 na Nat 皮质 等 低渗 H Na 质 H20x度 CH2 渗 Nat H20 等渗 tC- ADH H20 Na+ cl 髓袢 25%Na+ reabsorption in the kidneyNa+, Cl－ reabsorption in the kidney 25％Na+ 65-70％Na+ 10％Na+