2020 Excretory Products and their EliminationRegulation of Kidney Function Medium Question 3 of 8 in Regulation of Kidney Function

Which of the following would help in prevention of diuresis?

A Reabsorption of $Na^+$ and water from renal tubules due to aldosterone
B Atrial natriuretic factor causes vasoconstriction
C Decrease in secretion of renin by JG cells
D More water reabsorption due to undersecretion of ADH

The answer is A.

Solution

The adrenal cortex secretes mineralocorticoids like aldosterone, which increase the reabsorption of $Na^+$ and water from the renal tubules. This prevents diuresis. (ANF causes vasodilation, decreased renin reduces reabsorption, and undersecretion of ADH causes more water loss.)

Concept prevention of diuresis

Regulation of Kidney Function in past papers

8 questions from this chapter have appeared across 8 exam years.