Which of the following statements is incorrect?

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The efferent arteriole forms a fine capillary network around the renal tubule called peritubular network.

A minute blood vessel that runs parallel to the Henle’s loop and forms ‘U’ shaped tube called vasa recta.

Vasa recta is absent or highly reduced in juxta medullary nephrons.

The renal tubule begins with double walled cup like structure called Bowman’s capsule.

answer is C.

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Detailed Solution

Vasa recta is absent or highly reduced in cortical nephrons.

The vasa recta refers to the specialised capillaries that supply blood to the medulla of the kidney. These blood vessels are involved in maintaining the concentration gradient in the medulla, which is crucial for the kidney's ability to concentrate urine. Cortical nephrons, which make up the majority of nephrons in the kidney, are primarily responsible for the filtration and reabsorption of substances from the blood. They have a relatively short loop of Henle that doesn't extend deep into the medulla. As a result, the vasa recta associated with cortical nephrons are either absent or highly reduced in comparison to juxtamedullary nephrons, which have longer loops of Henle that extend deep into the medulla.

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