The cell membrane separates the interior of the cell from its surroundings, but it does allow the passage of some small molecules from regions of higher concentration to regions of lower concentration. This process is called
A) osmosis.
B) simple diffusion
C) dialysis.
D) dissolution.
E) active transport.

Question

Quizplus · Accepted Answer

Simple diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration, across a selectively permeable membrane like the cell membrane. Osmosis is the diffusion of water across the membrane, but it implies the movement of water only, not other small molecules. Dialysis is a process of separating molecules based on their size through a selectively permeable membrane. Dissolution refers to the process of dissolving a solute in a solvent to form a homogeneous mixture. Active transport requires energy input from the cell to move molecules against their concentration gradient.

The Cell Membrane Separates the Interior of the Cell from Its