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Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology (view source)
Revision as of 15:52, 4 September 2008
, 15:52, 4 September 2008→Intercalated Cells of Collecting Duct
=====Intercalated Cells of Collecting Duct=====
=====Intercalated Cells of Collecting Duct=====
* Potassium is absorbed here in exchange for hydrogen
* Potassium is absorbed here in exchange for hydrogen
==H<sup>+</sup> and HCO<sub>3</sub><sup>-</sup>==
* H<sup>+</sup> ions are secreted in the cortical and medullary collecting tubules
* This is an active secretion using a H<sup>+</sup> ATPase
* Also a H<sup>+</sup>/K<sup>+</sup> ATPase antiporter
* The main function of this is maintaining [[Potassium Homeostasis - Physiology| potassium]]
* HCO<sub>3</sub><sup>-</sup> is reabsorbed here
===Urea===
===Urea===