Question

In the kidney, facultative re-uptake of water and sodium occurs at the level of _______ under the influence of ________ & __________.
a) glomerular capsule aldosterone, vasopressin
b) Loop of Henle, aldosterone, vasopressin
c) Collecting duct, oxytocin, angiotensin
d) Proximal convoluted tubule, aldosterone, vasopressin
e) Collecting duct, aldosterone, vasopressin

Answer 1

Answer:

The correct answer is e) Collecting duct, aldosterone, vasopressin

Explanation:

ADH( antidiuretic hormone) is called vasopressin formed by the hypothalamus gland and released when the body is under stress of shortage of water.  

This hormone binds to the water channel receptors present in the collecting duct and opens them. Then the water is released in the interstitial space and returns to the blood by reabsorption.

Decrease in the blood flow results in the release of aldosterone which regulates the blood pressure by absorbing the water and sodium ions from the collecting duct increasing blood volume and osmolarity.