Water reabsorption through the proximal convoluted tubule is termed obligatory water reabsorption,whereas water reabsorption through the distal convoluted tubule is termed facultative water reabsorption.

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Obligatory water reabsorption refers to the automatic reabsorption of water in the proximal convoluted tubule, while facultative water reabsorption refers to the controlled reabsorption of water in the distal convoluted tubule and collecting ducts, based on the body's needs for fluid balance.

Water Reabsorption Through the Proximal Convoluted Tubule Is Termed Obligatory