Plasma Membrane Transport

Front

Facilitated diffusion

Back

A type of passive transport where membrane proteins assist molecules in crossing the cell membrane.

Front

Passive transport

Back

Movement across the cell membrane that does not require energy.

Front

Diffusion

Back

The simplest type of passive transport where molecules spread out from an area of high concentration to an area of low concentration.

Front

Active transport

Back

Movement of molecules across the cell membrane that requires energy.

Front

Concentration gradient

Back

The difference in concentration of a substance across a space, driving diffusion.

Front

Osmosis

Back

The diffusion of water molecules through a selectively permeable membrane.

Front

Selectively permeable membrane

Back

A membrane that allows certain molecules to pass while blocking others.

Front

Equilibrium

Back

A state where the concentration of a substance is equal throughout a space.

Front

Endocytosis

Back

The process by which cells take in substances by engulfing them in a membrane.

Front

Exocytosis

Back

The process by which cells expel substances by vesicles fusing with the membrane.