The long loop of Henle functions as a countercurrent multiplier.

Question

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The long loop of Henle functions as a countercurrent multiplier by creating an osmotic gradient that allows for water reabsorption and concentration of urine. This occurs through the exchange of ions and solutes between the ascending and descending limbs of the loop, which creates a gradient that enables water to move from the tubule into the surrounding tissue and blood vessels.

The Long Loop of Henle Functions as a Countercurrent Multiplier