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Sodium Balance

QuestionAnswer
Aldosterone -Steroid hormone (mineralocorticoid) -Made in adrenal cortex -Always present to some extent
-Allows passive entry of Na+ into cell down electrochemical gradient via cotransporter, exchanger, or channel -*NO* Na K ATPase on luminal membrane to return Na+ back into lumen
-Na+ actively extruded from cell and prevented from re-entry by Na K ATPase -Also passive paracellular transport incl passive Na+ reabsorption
Created by: Abbyterrill
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