Page 9 - Osmosis and Diffusion - FULL
P. 9

Semi-Permeable Cell Membrane


        A cell membrane is known as a semi-permeable
        membrane since it only allows certain substances
        to move into and out of the cell.

























                                                                            Inside Cell








                                                                                                       Some
                                                                                                   substances
                                                                                                  pass through
                                                                                                    membrane



           C    M





                                                                                                    Substance
                                                                                                    too large to
                                                                                                    easily pass
                                                                                                      through




                                                                        Outside Cell






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