Starting from the collecting duct,indicate the order in which urea molecules move to maintain the medullary concentration gradient.
(1)ascending limb
(2)distal convoluted tubule
(3)interstitial fluid
(4)collecting duct
(5)descending limb
A)2,5,1,4,3
B)1,3,5,2,4
C)3,5,1,2,4
D)4,2,1,3,5
E)4,3,5,1,2

Question

Quizplus · Accepted Answer

Urea moves from the collecting duct (4) into the interstitial fluid (3), then into the descending limb (5), followed by the ascending limb (1), and finally the distal convoluted tubule (2) to maintain the medullary concentration gradient.

Starting from the Collecting Duct,indicate the Order in Which Urea