Biology Transport Mechanisms

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Diffusion

Back

The movement of molecules from a region of higher concentration to a region of lower concentration.

Front

Facilitated Diffusion

Back

The molecules move from the region of higher concentration to the region of lower concentration assisted by a channel.

Front

Osmosis

Back

The movement of water molecules through a selectively permeable membrane.

Front

Passive Transport

Back

The movement of substances from an area of high concentration to an area of low concentration without the use of energy.

Front

Active Transport

Back

The process of moving substances from a low concentration area to a high concentration area using energy.

Front

Endocytosis

Back

Process by which a cell "eats" or takes in materials from its surrounding environment by engulfing them with a part of its cell membrane.

Front

Exocytosis

Back

A process that occurs when a cell moves large materials from inside the cell to the outside of the cell.

Front

Cell

Back

The smallest unit of life that can live on its own and is the basic building block of all living things.

Front

Tissue

Back

A group of cells that work together to perform a specific function and have a similar structure.

Front

Organ

Back

A structure composed of a group of different tissues that work together to perform a specific function.