Water moves out of filtrate in the nephron tubule into the interstitial fluid by

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Water moves out of the filtrate in the nephron tubule by osmosis, which is the movement of water from an area of high concentration (of water) to an area of low concentration (of water) across a semipermeable membrane. The interstitial fluid surrounding the nephron tubule has a higher concentration of solutes (such as sodium and chloride ions) than the filtrate, which creates an osmotic gradient that drives the movement of water out of the tubule and into the interstitial fluid.

Water Moves Out of Filtrate in the Nephron Tubule into the Interstitial