The descending limb of the Loop of Henle is permeable to water so water dif- fuses out of the descending limb into the interstitial fl uid. What happens to this water? A. it fl ows through the renal papillae into the minor calyces to become urine. B. it diffuses into the ascending limb of the Loop of Henle. C. it diffuses into the peritubular capillaries and ascending vasa recta for return to the blood. D. it diffuses into the fi ltrate for elimination from the body.
Option C. Water (and solutes) which are reabsorbed from the filtrate go back to the blood movement thru the peritubular capillaries and the vasa recta.
