Biology / Bio 3241 · Atom · ~20 seconds
ADH and Aquaporin Insertion in the Collecting Duct
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Antidiuretic hormone, per Bio 2935, inserts aquaporin channels into the kidney's collecting duct, letting water move out along the gradient the loop of Henle, per Bio 3239, established.
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Without ADH, the collecting duct stays impermeable despite the surrounding gradient being present.
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The gradient, per Bio 3239, sets the concentrating potential — ADH determines how much of it the duct uses.