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What is Aldosterone acts at: and explain in detail?
Ans. A Collecting ductRef: Ganong, 23rd ed. pg. 648* Aldosterone is secreted from adrenal cortex.* Action of aldosterone is localized to distal tubule are collecting duct.* Mechanism: Stimulates Na+K+ ATPase at basolateral end which generate gradient for movement of sodium ion from apical membrane causing an increase in sodium: reabsorption.