13. The following structures are part of the nephron. In which of these structures is water re-absorbed?
I. Proximal Tubule
II. Distal Tubule
III. Descending limb of the loop of henle
IV. Ascending limb of the loop of henle
V. Collecting duct
a. I only
b. I and II only
c. I, II and III only
d. I, II, III and IV only
e. I, II, III and V only
e. I, II, III and V only
Water re-absorption occurs mainly in the proximal tubule, distal tubule, descending limb of the loop of henle, and the collecting duct.