Difference btwn ADH and aldosterone

[bluesolic]

ADH increases permeability of h2o and aldosterone increase permeability of Na which also absorb h2o at the same time.

So they both increase the blood pressure ,

But they are different.

What is the main different of function to the body ?

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[shootingstar7]

ADH doesn't allow for absorption of salts, but aldosterone does

 

[Sandstorm]

ADH increases permeability of h2o and aldosterone increase permeability of Na which also absorb h2o at the same time.

So they both increase the blood pressure ,

But they are different.

What is the main different of function to the body ?

Adh is released in response to an increase in blood osmolarity. It acts on the collecting duct of the nephron to open aquaphorins and allow the re absorption of water back into the body. When you retain more water, you decrease your blood osmolarity.

It does have the effect of increasing blood volume/pressure, but it is not released for this function unless there is SIGNIFICANT decrease in BP.


Aldosterone is released in response to decreased blood pressure. Just like everything else with the adrenal glands, it is released as a part of the stress response. When your blood pressure gets too low, aldosterone is released and also acts on the collecting ducts of the nephrons. In this case, it causes the uptake of sodium from the filtrate (so you're retaining it in your body instead of peeing it out). Water follows the salt, increasing blood volume and thus pressure, but ultimately not changing plasma osmolarity