Choose the correct statement given below regarding juxta medullary nephron.
- Juxta medullary nephrons are located in the columns of Bertini.
- Renal corpuscle of juxta medullary nephron lies in the outer portion of the renal medulla.
- Loop of Henle of juxta medullary nephron runs deep into medulla.
- Juxta medullary nephrons outnumber the cortical nephrons.
Answer
(3) 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.
(1) Columns of Bertini are cortical extensions between the medullary pyramids; nephrons are not located there.
(2) The renal corpuscle of every nephron lies in the cortex (for juxta medullary nephrons, close to the cortex–medulla junction), not in the medulla.
(4) Cortical nephrons (about 85%) outnumber the juxta medullary nephrons.
Answer: (3)