Question

In which part of kidney does reabsorption of water occurs even in presence of the hormone ADH?

• A. Proximal Convoluted Tubule
• B. Distal Convoluted Tubule
• C. Collecting Duct
• D. Loop of Henle

Answer 1

The correct option is A

Proximal Convoluted Tubule

The correct option is A.

Explanation for correct option:

1. The proximal convoluted tubule is involved in the reabsorption of water, sodium ions, chloride ions, and sugar from the glomerular filtrate.
2. It functions even in presence of the hormone ADH (Anti-diuretic hormone).
3. It lies between Bowman's capsule and loop of Henle.

Explanation for incorrect option:

Option B:

1. Distal convoluted tubule is a small nephron segment which lies between the collecting duct and macula densa.
2. It plays important role in regulating electrolyte homeostasis and extracellular fluid volume.

Option C:

1. Collecting duct is the last part of kidney.
2. Its function is to collect urine from the nephrons and carries it to renal pelvis and ureters.

Option D:

1. The key function of the loop of henle is the recovery of water and sodium chloride from urine.

Final answer: Proximal convoluted tubule is involved in reabsorption of water even in presence of hormone ADH (Anti-diuretic hormone).