The __________ acts as a countercurrent exchanger.
A)juxtaglomerular apparatus
B)peritubular capillaries
C)vasa recta
D)macula densa

Question

Quizplus · Accepted Answer

The vasa recta is a network of capillaries that runs parallel to the loop of Henle in the renal medulla. It acts as a countercurrent exchanger because the blood flows in the opposite direction of the filtrate in the loop of Henle, which allows for the exchange of solutes and water between the two. This helps to maintain the osmotic gradient in the renal medulla that is necessary for regulating urine concentration. The juxtaglomerular apparatus, peritubular capillaries, and macula densa are all involved in the regulation of blood pressure and renal function but do not directly act as countercurrent exchangers.

The __________ Acts as a Countercurrent Exchanger