Q.

Which of the following would help in prevention of diuresis            [2020]

1 More water reabsorption due to undersecretion of ADH.  
2 Reabsorption of Na+ and water from renal tubules due to aldosterone.  
3 Atrial natriuretic factor causes vasoconstriction.  
4 Decrease in secretion of renin by JG cells.  

Ans.

(2)

Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+and phosphate ions. Thus, aldosterone helps in prevention of diuresis.