What does the countercurrent mechanism accomplish in the nephron loop?
A) production of very dilute urine
B) secretion of water and electrolytes into the filtrate
C) creation of a steep concentration gradient for continued water reabsorption
D) constriction of the arterioles to increase blood pressure

Question

Quizplus · Accepted Answer

The countercurrent mechanism in the nephron loop creates a steep concentration gradient in the medulla, which facilitates the reabsorption of water from the collecting ducts, allowing for the production of concentrated urine.

What Does the Countercurrent Mechanism Accomplish in the Nephron Loop