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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.
Aldosterone (aka mineralocorticoid): Adrenal glands release aldosterone, causes kidney (distal tubules) reabsorb more Na+, which in turn causes more water reabsorption. ADH (made in hypothalamus, stored in pituitary): causes more water reabsorption in the kidney tubules, raising blood pressure.