If a cell were bathed in an extracellular solution high in Na⁺, what type of ion movement would maintain the proper balance of Na⁺ ions between the inside and the outside of the cell? A) Active transport of Na⁺ against its concentration gradient B) Facilitated diffusion of Na⁺ through ion channels C) Secondary active transport of K⁺ D) Simple diffusion of Na⁺ E) Simple diffusion of K⁺

Question

Quizplus · Accepted Answer

Since the extracellular solution is high in Na⁺, the Na⁺ ions would tend to move into the cell by simple diffusion. Therefore, in order to maintain the proper balance of Na⁺ ions between the inside and the outside of the cell, active transport of Na⁺ against its concentration gradient would be necessary.

If a Cell Were Bathed in an Extracellular Solution High