Cell+Membrane

=Cell Membrane = = = =media type="custom" key="5397129" align="left" width="20" height="36"= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =What is it: A thin fexible guard or barrier that surrounds all cells. = =Functions: The cell membrane forms a barrier between the inside and outside of a cell. It holds all of the cell pieces and fluids inside while keeping any harmful substances out. It contains some holes to let certain substances move in and out of the cell. The cell membrane regulates what enters and leaves the cell and also provides protection and support. =

=Location: Around the cell = =Where are they found: Every cell on earth has a cell membrane that surrounds it. = =Nickname: Gatekeeper or Guard = =Characteristics: Most cell membranes contain protein molecules that are embedded in its layer made by lipids. The layer is called a bilayer which means two layers, so it is made out of two layers of lipids. Carbohydrate molecules are attached to many of these proteins. Many of the carbohydrates allow individual cells to identify one another. = = =