Question

Choose the incorrect statement about the excretion by kidneys :

• A. Nearly 99% of glomerular filtrate is reabsorbed by renal tubules
• B. Ascending limb of loop of Henle is impermeable to water
• C. Descending limb of loop of Henle is permeable to electrolytes
• D. Maintenance of body potassium levels is primarily by tubular secretion in DCT

Answer 1

The correct option is C Descending limb of loop of Henle is permeable to electrolytes

Henle’s loop has a descending and an ascending limb. The descending loop of Henle is permeable to water but impermeable to electrolytes. Therefore, water can easily move out to the medullary fluid from the loop, thereby, helping to concentrate the filterate as it moves down the descending loop.