Countercurrent Mechanism
Trending Questions
- increasing
- decreasing
- constant
- increasing and then decreasing
- glomerulus; ultrafiltration
- glomerulus; counter current mechanism
- vasa recta; counter current mechanism
- vasa recta; secretion
- Maintaining a high osmotic pressure in the tissues between the tubules.
- Rapid removal of sodium ions from medullary tissue.
- High oxidative metabolism of medullary cells
- Rapid flow of blood through the medulla
Regarding the assertion and reason, choose the correct option.
Assertion [A]: The filtrate that moves from the PCT to the loop of Henle, remains isosmotic.
Reason [R]: About 50% of urea is reabsorbed.
Assertion [A] is True and Reason [R] is False.
Reason [R] is True and Assertion [A] is False.
Assertion [A] is True and Reason [R] is True but is an incorrect explanation to [A].
Assertion [A] is True and Reason [R] is True and is a correct explanation to [A].
We produce concentrated / dilute urine. This is facilitated by a special mechanism. Identify the mechanism.
Reabsorption from PCT
Reabsorption from Collecting Duct
Reabsorption/ Secretion in DCT
Counter current mechanism in Henle’s loop/ Vasa recta
Regarding the assertion and reason, choose the correct option.
Assertion [A]: The filtrate that moves from the PCT to the loop of Henle, remains isosmotic.
Reason [R]: About 50% of urea is reabsorbed.
Assertion [A] is True and Reason [R] is False.
Reason [R] is True and Assertion [A] is False.
Assertion [A] is True and Reason [R] is True and is a correct explanation to [A].
Assertion [A] is True and Reason [R] is True but is an incorrect explanation to [A].
I. Urine is hypertonic in distal convoluted tubule.
II. When the urine pases into the collecting tubule, it becomes hypotonic.
III. Urine is isotonic in Proximal Convoluted Tubule (PCT).
IV. Urine becomes more and more hypotonic as it passes throught the Henle's loop.
Select the correct answer using the codes given below.
- I and IV
- I, II and III
- II and III
- Only III
- Only I