alleryThe descending limb of Henle's loop is
APermeable to both water and electrolytes
BImpermeable to both water and electrolytes
CPermeable to water but not to electrolytes
DPermeable to electrolytes but not to water
Answer & Solution
Correct answer: C. Permeable to water but not to electrolytes
**Descending limb:** water permeable, electrolyte impermeable
filtrate becomes concentrated as it descends into the hyperosmotic medulla.
**Ascending limb:** the opposite
filtrate becomes dilute as Na+ and Cl- leave.
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