Slide 1

The Cell Membrane Slide 2 About Cell Membranes All cells have a cell membrane Functions: a.Controls what enters and exits the cell to maintain an internal balance b.Provides protection and support for the cell Slide 3 Outside of cell Inside of cell (cytoplasm) Lipid Bilayer Proteins Transport Protein Phospholipids Carbohydrate chains Structure of the Cell Membrane Go to Section: Animations of membrane structure Slide 4 About Cell Membranes (continued) 3.Structure of cell membrane Lipid Bilayer -2 layers of lipids a.Head is polar (water loving) a.Tails non-polar (water fearing) Lipid Bilayer Slide 5 Membrane movement animation Polar heads love water & dissolve. Non-polar tails hide from water. Slide 6 Proteins are embedded in the membrane and some act as pores. Pores Slide 7 About Cell Membranes (continued) The protein pores (holes) help move molecules. The cell membrane allows some molecules in and keeps other molecules out its Selectively Permeable: Pores Slide 8 http://www.worldofteaching.com Revised by R. OConnor Oct. 2010