Question

Our body retains NaCl, during the periods of excessive heat. Which of the following triggers this action?

• A. Aldosterone
• B. Progesterone
• C. ACTH
• D. Epinephrine

Answer 1

The correct option is A Aldosterone

• Body fluid volume disturbances involve an imbalance of intake and loss.
• Aldosterone plays a central role in the homeostatic regulation of blood pressure, plasma sodium (Na+), and potassium (K+) levels.
• It does so primarily by acting on the mineralocorticoid receptors in the distal tubules and collecting ducts of the nephron.
• It influences the reabsorption of sodium and excretion of potassium of the kidney, thereby indirectly influencing water retention or loss, blood pressure and blood volume.
• When dysregulated, aldosterone is pathogenic and contributes to the development and progression of cardiovascular and renal disease. Aldosterone has exactly the opposite function of the atrial natriuretic hormone secreted by the heart. Hence, Our body retains NaCl, during the periods of excessive heat and aldosterone triggers this action.

So, the correct answer is 'Aldosterone'.