Question

question 11
aldosterone fine tunes reabsorption of which of the following?
chloride
potassium
sodium
glucose

Explanation:

Aldosterone is a hormone produced by the adrenal cortex. Its main function is to regulate the reabsorption of sodium ($Na^{+}$) in the distal convoluted tubule and collecting duct of the nephron in the kidney. By increasing the reabsorption of sodium, it also indirectly affects the reabsorption of water (due to osmotic effects) and the secretion of potassium ($K^{+}$). Chloride reabsorption is to some extent coupled with sodium reabsorption in a passive manner in some parts of the nephron, but aldosterone's primary and direct "fine - tuning" is for sodium. Glucose reabsorption is mainly regulated by transporters like SGLT (sodium - glucose linked transporters) and is usually completely reabsorbed (in healthy individuals) in the proximal convoluted tubule, not under aldosterone's fine - tuning control for the purpose of osmoregulation and electrolyte balance (which is aldosterone's main role).

Answer:

Sodium