In the lumen of the proximal tubule,Na⁺ concentration ________ the Na⁺ concentration inside the cells of the tubule wall. A) is much higher than B) is slightly higher than C) is about the same as D) is slightly lower than E) is much lower than

Question

Quizplus · Accepted Answer

The concentration of Na⁺ in the lumen of the proximal tubule is much higher than the concentration inside the cells of the tubule wall. This concentration gradient allows for the active transport of Na⁺ from the lumen into the cells of the tubule wall.

In the Lumen of the Proximal Tubule,Na+ Concentration ________ the Na+

In the Lumen of the Proximal Tubule,Na⁺ Concentration ________ the Na⁺