Question

Which one of the following processes could result in the net movement of a substance into a cell, if the substance is more concentrated in the cell than in the surroundings?a. osmosisb. diffusion c. active transportd. facilitated diffusione. None of the choices are correct.

Answer 1

C. Active transport

Step-by-step explanation:

Active transport is the process by which cells introduce substances against their osmotic potential. It is the opposite of diffusion, where substances move through membranes without the need of extra energy, as they follow a favorable osmotic potential towards equilibrium.

Active transport needs special proteins on the membranes to perform the task, whereas diffusion may need them (facilitated diffusion) or not (osmosis) depending on the size of the incoming molecules and the membrane's permeability.