Choose the correct statement given below regarding juxta medullary nephron.
Answer: (B) Loop of Henle of juxta medullary nephron runs deep into medulla.. Answer: (B) Loop of Henle of juxta medullary nephron runs deep into medulla.
- A.Renal corpuscle of juxta medullary nephron lies in the outer portion of the renal medulla.
- B.Loop of Henle of juxta medullary nephron runs deep into medulla.✓
- C.Juxta medullary nephrons outnumber the cortical nephrons.
- D.Juxta medullary nephrons are located in the columns of Bertini.
Correct Answer
(B) Loop of Henle of juxta medullary nephron runs deep into medulla.
Solution & Explanation
Answer: (B) Loop of Henle of juxta medullary nephron runs deep into medulla. Solution: In juxta medullary nephrons the loop of Henle is very long and runs deep into the medulla — making option B correct. The other options are wrong: the renal corpuscle (Malpighian corpuscle) lies in the cortex (not the medulla); cortical nephrons outnumber juxta medullary nephrons (majority of nephrons are cortical); and the Columns of Bertini are cortical extensions between medullary pyramids, not the location defining these nephrons. NCERT Reference: Ch 16, p.208, lines 21-23 — "In some of the nephrons, the loop of Henle is very long and runs deep into the medulla. These nephrons are called juxta medullary nephrons."