Peritubular Capillaries and Vasa Recta — NEET Biology
📚 Practice ConceptThe efferent arteriole emerging from the glomerulus forms a fine capillary network around the renal tubule called the peritubular capillaries. A minute vessel of this network runs parallel to the Henle's loop forming a 'U' shaped vasa recta. Vasa recta is absent or highly reduced in cortical nephrons.
Assertion (A): Cortical and juxtamedullary nephrons differ in their vasa recta development. Reason (R): Cortical nephrons have well-developed vasa recta while juxtamedullary nephrons lack vasa recta.
View solution & NCERT explanation
Correct answer: C — If assertion is true but reason is false.
NCERT states “Vasa recta is absent or highly reduced in cortical nephrons” which implies juxtamedullary nephrons have well-developed vasa recta for the counter-current mechanism. The Assertion is true - they do differ in vasa recta development. The Reason reverses the facts - cortical nephrons lack/have reduced vasa recta, while juxtamedullary nephrons have well-developed vasa recta.
What does NCERT say about efferent arteriole emerging from?
Has this concept appeared in NEET?
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