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Tubular Reabsorption and Secretion

Na+ and Cl-...

Question

$N a^{+}$ and $C l^{-}$ are absorbed in kidney in the region of

A

Ascending limb of Henles loop

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B

Descending limb of Henles loop

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C

DCT

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D

PCT

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Solution

The correct option is D DCT
The nephron is the structural and functional unit of the kidney. The body of the nephron is divided into Renal corpuscle, Proximal convoluted tubule( PCT), Henle's loop and Distal convoluted tubule( DCT). In DCT Na+ and Cl are absorbed. Hence the region of the kidney in which Na+ and Cl are reabsorbed is DCT by using sodium -chloride symporters.
So, the correct answer is 'DCT'.

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

N a^{+}

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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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Q. Assertion :The renal fluid becomes increasing concentrated when it flows down in the descending limb of loop of Henle towards inner medulla, but its concentration decreases in the ascending limb when it flows towards the cortex. Reason: The descending limb of the loop of Henle water is reabsorbed, the ascending limb is impermeable to water but salt are absorbed.

Q. Fill in the blanks with appropriate words.

Ascending limb of Henles loop is.......... to water whereas the descending limb is.......... to it.

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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