A portion of the tubule system of their nephrons allows mammals to produce urine that is 2 to 22 times as concentrated as their blood.This part of the tubular system is called the

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The loop of the nephron, also known as the loop of Henle, is the portion of the tubule system responsible for producing concentrated urine in mammals. It creates a concentration gradient within the kidney, allowing for the reabsorption of water and ions to produce urine that is more concentrated than the blood. The other options (B, C, D, and E) are not involved in this process.

A Portion of the Tubule System of Their Nephrons Allows