Answer
No water is absorbed because the ascending limb apical membrane is essentially impermeable to water.
Work Step by Step
The ascending limb of the nephron loop absorbs several ions--Na+, K+, Cl-, HCO3-, Ca++, and Mg++. However, in this site the reabsorption of water does not naturally follow the reabsorption of solutes, due to the low permeability of these membrane cells to water. This differential permeability enables the ascending nephron loop to function, importantly, in the independent regulation of the volume and osmolarity of body fluids.
