Question

The cytoplasm of animal cells has a concentration of potassium ions (K+) as much as 20 times higher than the concentration outside the cell. How do cells move potassium ions against a concentration gradient, from a lower concentration to a higher one?

A. facilitated diffusion
B. Active transport
C. Osmosis
D. Diffusion

Answer 1

Active transport means moving against a concentration gradient, from a lower concentration to a higher one