<prompt> Water reabsorption in loop of henle is?Through aquaporin-1 in distending limbThrough aquaporin-1 in ascending limbDue to ADH in ascending limbDue to aquaporin-2 in ascending limb  <response>: Ans. is a i.e., Through aquaporin-l in descending limb fRef: Principles of medical physiology p. 3I2lAscending limb of loop of Henle especially thick ascending limb is ako called the diluting segment of nephron because of its ability to dilute the urine,Thin descending segment limb:This segment is highly permeable to water and relatively impermeable to solutes sodium, chloride and urea.Therefore, only water is reabsorbed from the thin descending limb of loop of Henle and the fluid in the descending limb becomes hypotonic.This water absorption is also obligatory and occurs through aquaporin-l water channel.No active secretion or reabsorption takes place in this segment. 