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Question

Which of the following statements is incorrect ?
  1. Mammals have the ability to produce concentrated urine.
  2. Counter current is due to the flow of filtrate in two limbs of Henle's Loop in opposite direction.
  3. Henle's loop and vasa recta play a significant role in concentrating the urine.
  4. Flow of fitrate through vasa recta also follow the counter current pattern.

A
Counter current is due to the flow of filtrate in two limbs of Henle's Loop in opposite direction.
B
Mammals have the ability to produce concentrated urine.
C
Henle's loop and vasa recta play a significant role in concentrating the urine.
D
Flow of fitrate through vasa recta also follow the counter current pattern.
Solution
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The correct option is D Flow of fitrate through vasa recta also follow the counter current pattern.
Flow of blood through vasa recta follows counter current pattern. Filtrate flows through loop of Henle.

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Similar Questions
Q1
Counter current mechanism between loop of Henle and vasa recta results in reabsorption of water from:
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Q2
Counter current mechanism helps in concentrating urine in animals and mainly operates on:
a. Henle's loop b. Vasa-recta
c. PCT d. DCT
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Q3

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

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Q4
Consider the following statements each with one or two blanks.
(i) The ascending limb of loop of Henle is impermeable to (1) but allows transport of (2)
(ii) (3) and (4) play a significant role in producing a concentrated urine.
(iii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release (5)
Which one of the following options correctly fills the blanks in any two of the statements?
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Q5
The counter current system of vasa rectae retains the reabsorbed Na+ in the medullary tissue.
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