Movement of sodium across the cells of the collecting duct relies on which one of the following?
A) tubular secretion
B) glomerular filtration
C) tubular reabsorption
D) active transport
E) bulk flow

Question

Quizplus · Accepted Answer

Active transport is the movement of ions across a cell membrane against their concentration gradient, requiring energy. In the collecting duct, sodium is actively transported out of the cells, creating a concentration gradient that drives water reabsorption.

Movement of Sodium Across the Cells of the Collecting Duct