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Reabsorption and Secretion Along the Proximal Tubule - Anatomy & Physiology (view source)
Revision as of 16:30, 3 September 2008
, 16:30, 3 September 2008→[[Potassium Homeostasis - Physiology#Renal Control| Potassium]]
===[[Potassium Homeostasis - Physiology#Renal Control| Potassium]]===
===[[Potassium Homeostasis - Physiology#Renal Control| Potassium]]===
* Potassium is absorbed mainly by the paracellular route with water via osmosis
* Na<sup>+</sup> / K<sup>+</sup> ATPases in the basolateral membrane move potassium into epithelial cells from the interstitial spaces in order to remove sodium
* Potassium is then cleared from the cells using a co-transporter with chlorine
* No potassium excretion occurs here due to the lack of potassium ion channels in the apical membrane
===[[Renal Handling of Urea - Physiology| Urea]]===
===[[Renal Handling of Urea - Physiology| Urea]]===