Which term refers to the process of removing valuable molecules from urine prior to its exit from the kidney?

Reabsorption is the process by which the kidneys take useful molecules, such as glucose, water, and ions, back out of the forming urine and return them to the blood. Filtration is the initial movement of fluid and small substances from blood into the nephron, not the recovery of valuable molecules before urine leaves the kidney. Therefore, the correct choice is reabsorption.

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