Exchange+with+the+Enviornment

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What would happen to a factory if its power were shut off or its supply of raw materials never arrived? The factory would stop functioning. Like a factory, a cell must be able to obtain energy and raw material andget rid of waste.The exchange of materials between a cell and its enviornment,takes place at the cell's membrane. To understand, you need to know a little bit about diffusion.===== media type="youtube" key="1w10R9lv7eQ" height="256" width="416"media type="youtube" key="AYNwynwaALo" height="312" width="384" Diffusion-It is the movement of particles from an area where their concentration is high to an area where the concentration is low.

Osmosis-The diffusion of water through the cell membrane

Passive Transport-It is the diffusion of particles through the proteins.

Active Transport- Is the movement of particles through proteins against the normal direction of diffusion.

Endocytosis-Is when the cell membrane surronds a particle and encloses it in a vesicle.

Exocytosis- Is when vesicles are formed at the ER or Golgi Complex and carry the particles to the cell membrane