Question
ADH is a hormone that increases permeability of the ____ H2O reabsorption.
Answer
ADH is a hormone that increases permeability of the collecting duct to H2O, which increases H2O reabsorption.
Results in higher BP and lower blood osmolarity. The urine will be concentrated, aka higher urine osmolarity.
→ In contrast, Aldosterone reabsorbs Na+, and since water follows salt, so the blood osmolarity does not change as the Na+ gets the water to follow it to blood.
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