The movement of molecules from an area of high concentration to an area of low concentration.

A dissolved substance.

The process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane, and bringing it into the cell.

A solution that containing a lower amount of solutes, causing a cell placed in it to swell.

A solution that containing a higher amount of solutes, causing a cell placed in it to shrink.

A solution that has equal concentrations of solutes across a semipermeable membrane causing no change to the cell.

Substance with the ability to dissolve other substances to form a solution.

A process that occurs when a cell moves large materials from inside the cell to the outside of the cell using small spheres of membrane called vesicles.

Describes a membrane that allows certain substances to pass through it but not others.

The diffusion of solutes through transport proteins in the plasma membrane.

A state where the concentration of a substance is equal on both sides of the cell membrane.

Process by which a cell engulfs large materials such as food - "cell eating".

Process by which a cell engulfs extracellular fluids - "cell drinking".

The diffusion of water.