Cell Membrane & Cell Transport© Copyright NewPath Learning. All Rights Reserved. 94-4744Visit www.newpathlearning.com for Online Learning Resources.Cell MembraneEach cell is surrounded by a cell membrane which provides structure and controls the passage of materials between the cell and its environment. Cell Membrane CompositionA cell membrane consists of two layers composed of proteins and lipids. The lipid bilayer helps Some membrane proteins help certain substances cross the membrane barrier.transport proteincarbohydrateInside of CellOutside of Celllipid bilayercell membraneSemi-Permeable Cell MembraneA cell membrane is known as a semi-permeable membrane since it only allows certain substances to move into and out of the cell. cell membraneSelect substances can pass through the membrane.Some substance are too large to pass through the cell membraneInside of CellOutside of CellEach cell is surrounded by a cell membrane which provides structure and controls the passage of materials between the cell and its environment. AAAA ceeeeeelllllllllllllll mmmmmmmmemmmmmmmmmmmmbbbbbbbbbbbbbbbbbbbbbbrrrrrrrrrrraaaaaaaaaannnnnnnnnnneeeeeeeeeeee cccccoooonnnnssssiiiisssssts of two layers composed oooooffff proteinnnnnnnnnnnnnnssssssssssssssss aaaandddd llllllllllllllllllllllllliiiiiiiiiiippppppppppppiiiiiiiidddddddddddddssssssssss. The lipid bilayer helps SSSSoooome meemmmmmbbbbrrraaannnneeeee pppproteins help certain substances cross the memmmmbbbbrrrrraaaane barrier.tttttttttttttrrrrrrrrrrrrrraaaaaaaaaaaaaannnnnnnnnnspoooooooooooorrrrrrrrrrrtttttttttttttt ppppppppppppprrrrrrrrrrroooooooooooottttttttttttttteeeeeeeeeeeeeeeiiiiiiiiiinncarbohydratelipid bilayerpliyal p d ayppybryeyeyipp drrrillad bbpaarreeiyyaabbbbbyyppippbbparrraaddppb ayblipid bilayerplibd yearlippid b ay rcell membraneA cell membrannnnnnnnnnnnnneeeeeeeee issss kkkknnnnoooownnnn aaaasss a semi-permeabbbblllle mmmmmeeembbbrrraaaannnnneeee siiiinnnncccceeee it only allowwwssss ceeerrrrtttttaaiiiinnnn sssssuuuubstaannnnccccceeeess tttoooo move into aaaaannnnndddd oooouuuutttt oooofffff ttttthhhheeee ccccceeeeellll. ceeeeeeeeeeeeellllllllllllllllllllll membraneSeleccccccccccccttttttttttttt sssssssssuuuuuuuuuubbbbbbbbbbbbbbbbbbbsssssssssssssttttttttttttttttaaaaaaaaaaaaaaaannnnnnnnnnnnnccces can pass through the membrane.SSSSSSSSSSSSSSSSooooooooommmmmmmmmmmeeeeeeeeee sssssssssssssuuuuuuuuuuuubbbbbbbbbbbbbbssssssssssssssttttttttttttttaaaaannnnnnnnnnnnccccccccccccccceeeeeeeeeeee aare tttttttoooooooooooooooooooooooooooo lllllllllaaaaaaaaaarrrrrrgggggggggggggggeeeeeeeeeeeee ttttttttttoooooooooo pass tttttttttttttthhhhhhhhhhhhhhhrrrrrrrrrrrroooooooooouuuuuuuuuugggggggggggghhhhhhhhhh tthe cell membrannnnnnnneeeeeeeeeeeee
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