Question

ADH regulates the permeablility of

• A. Proximal convoluted
• B. Collecting tubule and distal - convoluted tubule
• C. Ascending limb of loop of Henle
• D. Descending limb of loop of Henle

Answer 1

The correct option is B Collecting tubule and distal - convoluted tubule

ADH (Antidiuretic hormone) or vasopressin is a hormone which is secreted from the posterior lobe of pituitary gland. This hormone increases the reabsorption of water in the distal convoluted tubule and collecting ducts of the nephrons of the kidneys. As a result, the reabsorption of water from the glomerular filtrate is increased. It also regulates the permeability. Involuntary muscles in the walls of the intestine, gallbladder, urinary bladder and blood vessels are stimulated to contact by ADH.