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When aldosterone is absent, Na+ reabsorption in the nephron is greatly reduced, and as 30-40g of sodium can be lost in the urine daily. The answer is decreased. Site: Anatomy and Physiology Eighth Edition by Seeley Stephens Tate.
Hyperaldosteronism is characterized by excessive secretion of aldosterone, which causes increases in sodium reabsorption and loss of potassium and hydrogen ions.It may be either primary (autonomous) or secondary.ormal aldosterone physiology. Aldosterone participates in the homeostasis of circulating blood volume and serum potassium concentration; these, in turn, feed back to regulate aldosterone secretion by the zona glomerulosa of the adrenal cortex.