Fill in the Blanks Cell Membrane/DiffusionOnline version Cell Membrane/Diffusion by Michelle Testa 1 organelle Larger diffusion permeability Smaller selective out allowed Not large pass inside enter animal energy passive outside active small plant controls damage inside The cell membrane is the cell that what goes into and out of a cell . In an cell , the cell membrane is the edge and surrounds the entire cell . In a cell , the cell membrane is located just the cell wall . everything is able to go through the cell membrane : some things are through while others are kept . This characteristic is known as and it helps the cell keep out chemicals that might the cell . The materials that are allowed to the cell can go through in one of two ways . molecules can just float through the cell membrane without any help or effort . This process is called transport . The small molecules just right through the membrane . molecules need help to get through the cell membrane . The cell membrane uses to pull and push the large molecules through . This process is called transport . Passive transport is sometimes called . When there is a amount of a material outside of the cell , and a amount inside , the molecules will move from where there is a lot to where there are few . For example , when there is a lot of water outside of the cell , the water molecules will move to the of the cell .
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