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===Potassium and Aldosterone===
 
===Potassium and Aldosterone===
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* [[Aldosterone]] is the most important regulator of potassium
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* [[Important Hormonal Regulators of the Kidney - Anatomy & Physiology#Potassium|Aldosterone]] is the most important regulator of potassium
 
* It causes increased secretion of potassium
 
* It causes increased secretion of potassium
* Increased potassium directly stimulates [[Aldosterone]] secretion
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* Increased potassium directly stimulates [[Important Hormonal Regulators of the Kidney - Anatomy & Physiology#Potassium|Aldosterone]] secretion
 
* Increases the activity and number of Na<sup>+</sup> / K<sup>+</sup> ATPase in basolateral membranes of the principal cells in the collecting duct and distal tubule
 
* Increases the activity and number of Na<sup>+</sup> / K<sup>+</sup> ATPase in basolateral membranes of the principal cells in the collecting duct and distal tubule
 
* Potassium moves into the cells and is then excreted down an electro-chemical gradient
 
* Potassium moves into the cells and is then excreted down an electro-chemical gradient
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