Question

Which of the following causes an increase in sodium reabsorption in distal convoluted tubule?

• A. Increase in aldosterone levels
• B. Decrease in antidiuretic hormone levels
• C. Decrease in aldosterone levels
• D. None of the above

Answer 1

The correct option is A Increase in aldosterone levels

Aldosterone of adrenal cortex serves to stimulate renal absorption of sodium ions and water thereby increasing the blood volume. Reduced aldosterone level increase sodium secretion by DCT. Antidiuretic hormone (ADH) is secreted by posterior pituitary gland and targets nephrons to increase water reabsorption and thereby decreasing water content in urine. This makes option A correct.