Question

question 34
which of the following stimulates na+ reabsorption in the kidney?
angiotensin ii
aldosterone
angiotensin i
renin

Explanation:

Aldosterone is a hormone that acts on the kidneys' distal convoluted tubule and collecting duct. Its main function is to increase the reabsorption of sodium ($Na^{+}$) ions and the excretion of potassium ($K^{+}$) ions. Angiotensin II has effects like vasoconstriction and stimulating aldosterone release (indirect effect on $Na^{+}$ reabsorption via aldosterone), but its primary direct role isn't $Na^{+}$ reabsorption in the kidney. Angiotensin I is an inactive precursor that gets converted to Angiotensin II. Renin is an enzyme that starts the renin - angiotensin - aldosterone system (RAAS) cascade by converting angiotensinogen to Angiotensin I, but it doesn't directly stimulate $Na^{+}$ reabsorption.

Answer:

Aldosterone