Question

The Henle's loop of nephron is mainly responsible for reabsorption of water in the kidney. Which of the following has a long loop of Henle in its nephrons to conserve water?

• A. Polar bear
• B. Camel
• C. Frog
• D. Whale

Answer 1

The correct option is B Camel

Loop of Henle, long, U-shaped portion of the tubule that conducts urine within each nephron (q.v.) of the kidney of reptiles, birds, and mammals. The principal function of the loop of Henle appears to be the recovery of water and sodium chloride from the urine. This function allows production of urine that is far more concentrated than blood, limiting the amount of water needed as intake for survival. Many species that live in arid environments such as deserts have highly efficient loops of Henle. Camel has a long loop of Henle in its nephrons to conserve water. The nephrons of camels are equipped with number of juxtamedullary nephron in very high amount along with a well-developed Henle’s loop. The amount of juxtamedullary nephrons is around 35% which is much more than in human beings 15%. The Henle’s loop of juxtamedullary nephrons along with counter flowing blood vessels, which is called vasa recta, assist in conservation of water.

So, the correct answer is 'Camel'.