Kidney Question

[Ruthless]

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Is the reabsorption of minerals in the ascending loop passive or active? Does anything in the kidney other than water diffuse anywhere passively?

 

[r8 dds]

I believe it's passive and active.

 

[Ruthless]

still no one knows anything about the kidney!

 

[toothdoc0121]

http://www.youtube.com/watch?v=glu0dzK4dbU

this will help you a lot

 

[solstice]

You should associate reabsrbtion mostly with Proximal tubule, not loop of henle:
So:
Proximal tubule:
reabsorbtion of Na/Amimo acids/all glucose and water follows
Secretion of H+ through Na+ antiport

Descending Loop of Henle:
Only permeable to water (water diffuse out), not permeable to Na+

Ascending: Not permeable to water anyhere, in the first buttom part Na+ diffuses out, in the upper portion Na diffuses Actively (this will be increased by aldosterone).

Distal tubule:
Na+/Ca2+ reabsorbtion
K+/H+ secretion
again Na+ reabsorbtion increased by Aldosterone

Colelcting tubule (do not confuse this with collecting duct)
Na+ reabsorbtion (passively), Water reabsorbtion only if ADH presents.

Collecting duct:
Na+ reabsorbtion (passively)
Water reabsorbtion only with ADH.

 

[prsndwg]

You should associate reabsrbtion mostly with Proximal tubule, not loop of henle:
So:
Proximal tubule:
reabsorbtion of Na/Amimo acids/all glucose and water follows
Secretion of H+ through Na+ antiport

Descending Loop of Henle:
Only permeable to water (water diffuse out), not permeable to Na+

Ascending: Not permeable to water anyhere, in the first buttom part Na+ diffuses out, in the upper portion Na diffuses Actively (this will be increased by aldosterone).

Distal tubule:
Na+/Ca2+ reabsorbtion
K+/H+ secretion
again Na+ reabsorbtion increased by Aldosterone

Colelcting tubule (do not confuse this with collecting duct)
Na+ reabsorbtion (passively), Water reabsorbtion only if ADH presents.

Collecting duct:
Na+ reabsorbtion (passively)
Water reabsorbtion only with ADH.

So there isnt only one place that reabsorption or secretion happens only right? They happen almost all over the nephrons in the kidney?!!