movement of solutes in the kidney

[OneManShow]

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I just want to be clear on what moves actively and what moves passively, so please correct me if I'm wrong:

In PCT, everything is reabsorbed actively; only water is reabsorbed passively.
In the thin descending loop, water is reabsorbed passively.
In the thin ascending loop, solutes such as Na, Cl, urea are moved passively.
In the thick ascending loop, solutes are moved actively.
During secretion at DCT, solutes are moved from the capillaries to the filtrate actively (is this correct? I'm not sure about this one)

ADH presence: water is reabsorbed passively.
Aldosterone: Na is reabsorbed activelypotassium is secreted actively (or passively?)

 

[PiBond]

I just want to be clear on what moves actively and what moves passively, so please correct me if I'm wrong:

In PCT, everything is reabsorbed actively; only water is reabsorbed passively.
In the thin descending loop, water is reabsorbed passively.
In the thin ascending loop, solutes such as Na, Cl, urea are moved passively.
In the thick ascending loop, solutes are moved actively.
During secretion at DCT, solutes are moved from the capillaries to the filtrate actively (is this correct? I'm not sure about this one)

ADH presence: water is reabsorbed passively.
Aldosterone: Na is reabsorbed activelypotassium is secreted actively (or passively?)

In PCT, everything isn't really reabsorbed actively. But for the MCAT, just know the the active reabsorption of Na+ (via a Na+/K+ pump on the proximal tubule basolateral membrane) is what drives the majority of ion/water reabsorption.

You're correct about descending loop and the thin/thick ascending loop.

You're correct about ADH mechanism.

Aldosterone causes an increase in synthesis of basolateral Na+/K+ pumps in the collecting duct. Therefore, you're correct about the active transport of both ions.

 

[Thirteeen]

I just want to be clear on what moves actively and what moves passively, so please correct me if I'm wrong:

In PCT, everything is reabsorbed actively; only water is reabsorbed passively.
In the thin descending loop, water is reabsorbed passively.
In the thin ascending loop, solutes such as Na, Cl, urea are moved passively.
In the thick ascending loop, solutes are moved actively.
During secretion at DCT, solutes are moved from the capillaries to the filtrate actively (is this correct? I'm not sure about this one)

ADH presence: water is reabsorbed passively.
Aldosterone: Na is reabsorbed actively potassium is secreted actively (or passively?) PASSIVE

http://upload.wikimedia.org/wikipedia/commons/a/a2/Renin-angiotensin-aldosterone_system.png

 

[SN2ed]

Thread moved. This type of question belongs in the Study Q&A forum.

 

[OneManShow]

ok thanks a lot