Counter current mechanism helps in concentrating urine in animals and mainly operates on
a. Henle’s loops b. Vasa – recta
c. $P C T$ d. $D C T$

All of these

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b only

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a only

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a and b

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Solution

The correct option is D a and b
Mammals have the ability to produce a concentrated urine. The Henle’s loop and vasa recta play a significant role in concentration of urine. The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus, forms a counter current.
So, the correct answer is- option c.

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Similar questions

Q. Counter current mechanism helps in concentrating urine in animals and mainly operates on:
a. Henle's loop b. Vasa-recta
c. PCT d. DCT

We can produce a concentrated/ dilute urine. This is facilitated by a special mechanism. identify the mechanism.
(a) Reabsorption from PCT
(b) Reabsorption from collecting duct
(c) Reabsorption/Secretion in DCT
(d) Counter current mechanism in Henle's loop vasa recta

Q. Henle’s loop along with _________ play a significant role in __________ which helps to produce concentrated urine.

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(i) Close proximity between Henle's loop and vasa recta
(ii) Counter current mechanism
(iii) Selective secretion of

H C O_{3}^{-}

and hydrogen ions in

P C T

(iv) Higher blood pressure in glomerular capillaries

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Counter current mechanism helps in concentrating urine in animals and mainly operates on a. Henle’s loops b. Vasa – recta c. PCT d. DCT

Counter current mechanism helps in concentrating urine in animals and mainly operates on
a. Henle’s loops b. Vasa – recta
c. $P C T$ d. $D C T$