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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> |