If the loop of Henle were absent from the mammalian nephron, which one of the following is to be expected?
Correct answer: D. The urine will be more dilute
- A. There will be no urine formation.
- B. There will be hardly any change in the quality and quantity of urine formed
- C. The urine will be more concentrated
- D. The urine will be more dilute
Explanation
Reabsorption is a process by which useful constituents of the glomerular filtrate are returned into the bloodstream. It occurs in convoluted tubules (proximal convoluted tubule) as well as the loop of Henle. Basically loop of Henle, in association with the vasa recta, plays an important role in the countercurrent mechanism (the process which makes urine hypertonic, i.e., more concentrated). Therefore, if Henle's loop was absent from the mammalian nephron, the urine would be more dilute.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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