Which of the following structure make the countercurrent mechanism?(a) Henle’s loop and glomerulus(b) PCT and DCT(c) Henle’s loop and vasa recta(d) Vasa recta and collecting ductI had been asked this question in exam.My question comes from Mechanism of Concentration of the Filtrate topic in section Excretory Products and Elimination of Biology – Class 11

Which of the following structure make the countercurrent mechanism?(a)

1.	Which of the following structure make the countercurrent mechanism?(a) Henle’s loop and glomerulus(b) PCT and DCT(c) Henle’s loop and vasa recta(d) Vasa recta and collecting ductI had been asked this question in exam.My question comes from Mechanism of Concentration of the Filtrate topic in section Excretory Products and Elimination of Biology – Class 11
Answer» RIGHT OPTION is (c) Henle’s loop and vasa RECTA To explain I would SAY: The specialized arrangement of Henle’s loop and vasa recta which enhances the transport of substances and helps in concentrating the URINE is known as counter-current mechanism.

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