Processes involved in the movement of substances across a membrane at the expense of ATP, via exchange pumps, are classified as ________.
A) osmosis
B) diffusion
C) filtration
D) facilitated diffusion
E) active transport

Question

Quizplus · Accepted Answer

The term "exchange pumps" suggests that there is a specific transport mechanism involving the use of ATP to move substances across a membrane, which is classified as active transport. Osmosis, diffusion, and facilitated diffusion do not involve the direct use of ATP to move substances against a concentration gradient. Filtration is a passive process that does not involve ATP.

Processes Involved in the Movement of Substances Across a Membrane