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Phloem Transport

The medullary...

Question

The medullary ascending limb of nephron remains permeable to Sodium,pottasium(K⁺) and chloride(Cl⁻) ions by a specific transport process. What is it?

A

Symport

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B

Active transport

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C

Passive transport

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D

Neutral transport

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Solution

The correct option is B
Active transport

The medullary ascending limb remains impermeable to water. Sodium,potassium(K⁺) and chloride(Cl⁻) ions are reabsorbed by active transport.

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Q. The ascending limb of Henle and the early distal tubule are __(i)__ to water. These regions actively transport __(ii)__ out of the filtrate and into the surroundings.

Q. Assertion :When urine moves through the descending limb, it becomes hypertonic and as it passes through the ascending limb of Henle's loop, it becomes hypotonic. Reason: The descending limb is permeable to sodium ions, while the ascending limb is impermeable to sodium ions.

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Diffusion, osmosis, impermeable, differentially permeable, fluid mosaic model, micellar theory, endocytosis, exocytosis, passive transport, active transport, microvilli, desmosomes, chemoreception
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Q. Read the following statement and select the correct option.
Statement 1 : When the urine moves through the descending limb, it becomes hypertonic to blood plasma and as it passes through are ascending limb, of Henle's loop it becomes hypotonic to blood plasma.
Statement 2 : The descending limb is permeable to sodium ions, while the ascending limb is impermeable to sodium ions.

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