Difference between revisions of "Reabsorption and Secretion Along the Nephron Summary Table - Anatomy & Physiology"
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− | {{ | + | {{toplink |
− | + | |backcolour = C1F0F6 | |
+ | |linkpage =Reabsorption and Secretion Along the Nephron - Anatomy & Physiology | ||
+ | |linktext =REABSORPTION AND SECRETION ALONG THE NEPHRON | ||
+ | |maplink = Urinary System (Content Map) - Anatomy & Physiology | ||
+ | |pagetype =Anatomy | ||
+ | }} | ||
+ | <br> | ||
<TABLE CELLPADDING="2" CELLSPACING="2" WIDTH="100%"> | <TABLE CELLPADDING="2" CELLSPACING="2" WIDTH="100%"> | ||
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*[[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>The reabsorption of sodium in the distal tubule is under the influence of two hormones: | <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> | + | *[[Important Hormonal Regulators of the Kidney - Anatomy & Physiology#Sodium|Aldosterone]] promotes sodium reuptake</TD> |
</TR> | </TR> | ||
<TR> | <TR> | ||
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*Potassium is on the whole excreted from the '''principal cells of the collecting duct | *Potassium is on the whole excreted from the '''principal cells of the collecting duct | ||
**This occurs via the paracellular route and via ion channels | **This occurs via the paracellular route and via ion channels | ||
− | ** The gradient for the loss via the ion channels is maintained by the sodium/ | + | ** 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 duct absorb potassium using a potassium/hydrogen antiporter | *The '''intercalated cells''' of the collecting duct 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 BGCOLOR="#C1f0f6"> | ||
− | [[Aldosterone]] acts of the sodium/potassium ATPase in the principal cells of the collecting duct increase potassium excretion.</TD> | + | [[Important Hormonal Regulators of the Kidney - Anatomy & Physiology#Potassium|Aldosterone]] acts of the sodium/potassium ATPase in the principal cells of the collecting duct increase potassium excretion.</TD> |
</TR> | </TR> | ||
<TR> | <TR> | ||
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*Freely diffuses from the collecting duct into the medullary interstitium | *Freely diffuses from the collecting duct into the medullary interstitium | ||
*[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Urea|Link to Article]]</TD> | *[[Reabsorption and Secretion Along the Distal Tubule and Collecting Duct - Anatomy & Physiology#Urea|Link to Article]]</TD> | ||
− | <TD> | + | <TD>ADH makes the collecting duct more permeable to Urea</TD> |
</TR> | </TR> | ||
<TR> | <TR> | ||
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<TD BGCOLOR="#C1f0f6"> | <TD BGCOLOR="#C1f0f6"> | ||
* The secretion of H<sup>+</sup> in this section of the nephron is mainly a result of the Na<sup>+</sup>/H<sup>+</sup> antiporter in the apical membrane using secondary active transport. | * The secretion of H<sup>+</sup> in this section of the nephron is mainly a result of the Na<sup>+</sup>/H<sup>+</sup> antiporter in the apical membrane using secondary active transport. | ||
− | *HCO<sub>3</sub><sup>-</sup> is reabsorbed here in a different way to other substances. The presence of hydrogen in the lumen causes some amount of it to dissociate to carbon dioxide and water via the enzyme carbonic anhydrase. These enter the | + | *HCO<sub>3</sub><sup>-</sup> is reabsorbed here in a different way to other substances. The presence of hydrogen in the lumen causes some amount of it to dissociate to carbon dioxide and water via the enzyme carbonic anhydrase. These enter the epitehlial cells where they are reformed using the same enzyme. The HCO<sub>3</sub><sup>-</sup> then leaves the cell using the basolateral 3HCO<sub>3</sub><sup>-</sup>/Na<sup>+</sup> symporter. |
− | *[[ | + | *[[Acid Base Balance By The Kidney - Anatomy & Physiology#Secretion of H+ and the Reabsorption of HCO3- in the Proximal Tubule|Link to Article]]</TD> |
<TD BGCOLOR="#C1f0f6"><center>N/A</center></TD> | <TD BGCOLOR="#C1f0f6"><center>N/A</center></TD> | ||
<TD BGCOLOR="#C1f0f6"> | <TD BGCOLOR="#C1f0f6"> | ||
*Hydrogen is excreted in the collecting ducts both in exchange for potassium and on its own using an ATPase. | *Hydrogen is excreted in the collecting ducts both in exchange for potassium and on its own using an ATPase. | ||
− | *Bicarbonate is reabsorbed. | + | *Bicarbonate is reabsorbed.</TD> |
− | |||
<TD BGCOLOR="#C1f0f6"><center>N/A</center></TD> | <TD BGCOLOR="#C1f0f6"><center>N/A</center></TD> | ||
</TR> | </TR> | ||
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*[[Reabsorption and Secretion Along the Loop of Henle - Anatomy & Physiology#Transport|Link to Article]]</TD> | *[[Reabsorption and Secretion Along the Loop of Henle - Anatomy & Physiology#Transport|Link to Article]]</TD> | ||
<TD>The regulation of how much calcium is reabsorbed occurs in the athe distal tubule and collecting ducts.</TD> | <TD>The regulation of how much calcium is reabsorbed occurs in the athe distal tubule and collecting ducts.</TD> | ||
− | <TD>[[Calcium #Parathyroid Hormone (PTH)| Parathyroid hormone]] stimulates reabsorption.</TD> | + | <TD>[[Calcium Homeostasis - Anatomy & Physiology #Parathyroid Hormone (PTH)| Parathyroid hormone]] stimulates reabsorption.</TD> |
</TR> | </TR> | ||
<TR> | <TR> | ||
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</TR> | </TR> | ||
</TABLE> | </TABLE> | ||
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Revision as of 15:00, 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 |
H+ and HCO3- |
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Glucose |
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Protein |
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Calcium |
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The regulation of how much calcium is reabsorbed occurs in the athe distal tubule and collecting ducts. | Parathyroid hormone stimulates reabsorption. |
Organic Acids and Bases |
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