Question

If you want to reabsorb sodium ions, but you do not want to increase the volume of the blood by reabsorbing large amounts of water from the filtrate, how would you adjust the amounts of ADH and aldosterone to accomplish this job?

a. Increase the amount of aldosterone and decrease the amount of ADH.
b. Decrease the amount of aldosterone and increase the amount of ADH.
c. Decrease the amount of both aldosterone and ADH.
d. Increase the amount of both aldosterone and ADH.

Answer 1

a. Increase the amount of aldosterone and decrease the amount of ADH.

Step-by-step explanation:

Aldosterone is a hormone which is responsible for the absorption of salts and water that is filtered in the kidneys according to the requirement of the body while ADH is also a hormone which helps in the regulation of water in your blood and also maintain volume of the blood in your body. If you want to reabsorb sodium ions, but do not want to increase the volume of the blood by reabsorbing large amounts of water from the kidneys, so increase the concentration of aldosterone but decrease ADH in the body.

Answer 2

The correct answer is: A. Increase the amount of aldosterone and decrease the amount of ADH.

Step-by-step explanation:

If the desired effect is to reabsorb sodium but without increasing the volume of water in blood, the correct approach would be to increase the amount of aldosterone and decrease the amount of ADH.

Aldosterone and ADH are both hormones that affect the function of the kidneys. Aldosterone is released by the adrenal gland when stimulated by angiotensin II, and has a central role in regulating the water and sodium balance in the body, by reabsorbing these substances when needed. ADH is released by the pituitary gland and has a direct effect in the retention of water.

If aldosterone was increased, sodium and water reabsorption would occur. But if, in addition to this, ADH was decreased, water would not be reabsorbed.