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Reabsorption and Secretion Along the Nephron Summary Table - Anatomy & Physiology (view source)
Revision as of 14:25, 4 September 2008
, 14:25, 4 September 2008no edit summary
*It is the cleared from the cells via the sodium/potassium ATPase
*It is the cleared from the cells via the sodium/potassium ATPase
*[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Sodium|Link to Article]]</TD>
*[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Sodium|Link to Article]]</TD>
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<TD>The reabsorption of sodium in the distal tubule is under the influence of two hormones:
*Atrial natriuretic peptide - inhibits sodium reuptake
*Aldosterone promotes sodium reuptake</TD>
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*Potassium is secreted into the lumen by the cells of the '''distal tubule'''
*Potassium is secreted into the lumen by the cells of the '''distal tubule'''
*Potassium enters the cell in exchange for sodium
**Potassium enters the cell in exchange for sodium
*It is excreted passively through ion channels and using a symporter with chlorine
**It is excreted passively through ion channels and using a symporter with chlorine
*Potassium is on the whole excreted from the '''principal cells of the collecting duct
**This occurs via the paracellular route and via ion channels
** The gradient for the loss via the ion channels is maintained by the sodium/pottasium ATPase in the basolateral membrane
*The '''intercalated cells''' of the collecting suct absorb potassium using a potassium/hydrogen antiporter
*[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Potassium|Link to Article]]</TD>
*[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Potassium|Link to Article]]</TD>
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<TD BGCOLOR="#C1f0f6">*Aldosterone acts of the sodium/potassium ATPase in the principal cells of the collecting duct increase potassium excretion.</TD>
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