Difference between revisions of "Reabsorption and Secretion Along the Nephron Summary Table - Anatomy & Physiology"
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*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> | ||
− | <TD></TD> | + | <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> | ||
</TR> | </TR> | ||
<TR> | <TR> | ||
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<TD BGCOLOR="#C1f0f6"> | <TD BGCOLOR="#C1f0f6"> | ||
*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> | ||
− | <TD BGCOLOR="#C1f0f6"></TD> | + | <TD BGCOLOR="#C1f0f6">*Aldosterone acts of the sodium/potassium ATPase in the principal cells of the collecting duct increase potassium excretion.</TD> |
</TR> | </TR> | ||
<TR> | <TR> |
Revision as of 14:25, 4 September 2008
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Sodium |
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The reabsorption of sodium in the distal tubule is under the influence of two hormones:
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Potassium |
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*Aldosterone acts of the sodium/potassium ATPase in the principal cells of the collecting duct increase potassium excretion. |
Urea |
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ADH makes the collecting duct more permeable to Urea |
Water | ||||
Glucose |
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N/A | N/A | N/A |
Protein |
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N/A | N/A | N/A |
Calcium |
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H+ and HCO3- |
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Organic Acids and Bases |
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N/A | N/A | N/A |