Statement-1: Small amount of urea enters the thick segment of Henle's loop which is tranported back to interstitium by collecting tubules.
Statement-2: Collecting tubules and thick segment of Henle's loop are permeable to urea.

Answer: DSolution: The deeper parts of thin ascending limbs of Henle's loop and collecting ducts are permeable to urea. Urea diffuses out of the collecting ducts and enters into the thin ascending limbs of Henle's loop. Only certain amount of urea is recycled and rest remains in interstitial fluid.