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Countercurrent Multiplication

The ascending...

Question

The ascending limb of the loop of Henle, transports solutes out and the descending loop transports water out to maintain a gradient, this is called .

A

flow of fluid

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B

single effect

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C

countercurrent

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D

flow of filtrate

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Solution

The correct option is B single effect
The ascending limb of the loop of Henle, transports solutes out and the descending loop transports water out to maintain an osmotic gradient. This process of single effect. These steps are repeated in order to multiply the gradient, hence it is called countercurrent multiplier.

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Q. Select the statements which are correct with respect to loop of Henle in a nephron.
1) Ascending limb of loop of Henle is impermeable to electrolytes, but is permeable to water.
2) Descending limb of loop of Henle is permeable to water but is impermeable to electrolytes
3) Both ascending and descending limbs are permeable to water.
4) Reabsorption is minimum in the ascending limb of loop of Henle.

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Q. Assertion :In the descending limb of the loop of Henle, the uring is hypertonic, while in ascending limb of the loop of Henle, the urine is hypotonic. Reason: Descending limb is impermeable to Na, while ascending limb is impermeable to

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Maximum amount of water from the glomerular filtrate is reabsorbed in

(a) proximal convoluted tubule

(b) descending limbs of loop of Henle.

(c) ascending limb of loop of Henle.

(d) distal convoluted tubule.

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