Materials can be moved from a low concentration to a high concentration through:
A) facilitated diffusion.
B) filtration.
C) osmosis.
D) active transport.

Question

Quizplus · Accepted Answer

Active transport is the only mechanism mentioned that can move materials from a low concentration to a higher concentration, as it requires energy input. Facilitated diffusion and osmosis both move materials down their concentration gradients, from high to low concentration, while filtration involves the movement of materials based on size and pressure gradients.

Materials Can Be Moved from a Low Concentration to a High