Ashton K, Koepsell H
Pflugers Arch. 1976 Jun 22;363(3):251-3. doi: 10.1007/BF00594610.
The role of active sodium transport in the partes rectae of subcortical and juxtamedullary proximal nephrons has not yet been established. Recent knowledge of the histotopographical positions of both types of pars recta has now enabled them to be accurately distinguished and isolated from freeze-dried sections. Na K ATPase activity was measured in single dissected tubular segments by an ultramicro method. No significant difference in Na K ATPase activity in the partes rectae from subcortical and juxtamedullary nephrons could be detected.
主动钠转运在皮质下和近髓质近端肾单位直部中的作用尚未明确。目前，关于这两种直部在组织拓扑学位置的最新知识，已使人们能够从冷冻干燥切片中准确区分并分离出它们。通过超微方法测定单个分离肾小管节段中的钠钾ATP酶活性。未检测到皮质下肾单位和近髓质肾单位直部的钠钾ATP酶活性有显著差异。
