Question

The portion of the tubule system that is relatively impermeable to solutes but contains many aquaporins for water reabsorption

Answer 1

Descending limb of loop of Henle

It helps to maintain the concentration of urine. It is highly permeable to water thus water is readily reabsorbed from the descending limb by osmosis. It is impermeable to sodium and chloride ions.

What is a Tubule system ?

The transverse tubular system is a network of interconnecting rings, each of which surrounds a myofibril

• The nephron uses four mechanisms to convert blood into urine: filtration, reabsorption, secretion, and excretion. These apply to numerous substances

• The distal convoluted tubule (DCT) and collecting duct (CD) are the final two segments of the kidney nephron. They have an important role in the absorption of many ions, and in water reabsorption.

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