Question

Choose the correct statement given below regarding juxta medullary nephron.

• A. Juxta medullary nephrons are located in the columns of Bertini.
• B. Renal corpuscle of juxta medullary nephron lies in the outer portion of the renal medulla.
• C. Loop of Henle of juxta medullary nephron runs deep into medulla.
• D. Juxta medullary nephrons outnumber the cortical nephrons.

Answer 1

The Correct Option is C

The juxta medullary nephron is a type of nephron located in the kidney, crucial for urine concentration. Consider the provided options about juxta medullary nephrons:

• Juxta medullary nephrons are not located in the columns of Bertini, which are extensions of the cortex into the medulla.
• The renal corpuscle of the juxta medullary nephron is situated close to the medulla, not in its outer portion, as it primarily straddles the boundary between cortex and medulla.
• The Loop of Henle associated with juxta medullary nephrons runs deep into the medulla, a key feature that differentiates them from cortical nephrons which have a shorter loop.
• Juxta medullary nephrons do not outnumber the cortical nephrons; in fact, they are fewer in number, comprising about 15% of all nephrons.

Therefore, the correct statement regarding juxta medullary nephrons is: Loop of Henle of juxta medullary nephron runs deep into medulla.

Answer 2

Evaluating Statements about Juxta Medullary Nephrons:

• Statement 1: Incorrect – The renal corpuscle of juxta medullary nephrons lies in the cortex, not in the outer portion of the renal medulla.
• Statement 2: Correct – The Loop of Henle of juxta medullary nephrons extends deep into the medulla, aiding in water conservation.
• Statement 3: Incorrect – Cortical nephrons outnumber juxta medullary nephrons.
• Statement 4: Incorrect – Juxta medullary nephrons are not located in the columns of Bertini.

Thus, the correct answer is (3) Loop of Henle of juxta medullary nephron runs deep into medulla.