September 6-ch 5

September 6-ch 5 - September 6, 2007 Chapter 5 Plasma...

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September 6, 2007 Chapter 5 Plasma membrane Functions o Isolates the cells contents from environments o Regulates exchange of essential substances o Communicates with other cells o Creates attachments with and between cells o Regulates reactions Dynamic, ever changing structures Phospholipid Bilayer Hydrophilic and hydrophobic layers that are held together by the presence of water Flexible, fluid membrane to allow of cellular shape changes Selectively isolate cell contents from external environment Phospholipid molecules are not bonded to one another Some of the phospholipids have unsaturated fatty acids Proteins are embedded in the phospholipid bilayer Membrane proteins o Receptor proteins Trigger cellular responses upon binding specific molecules o Recognition proteins Serve as identification tags on the surface of a cell Important in immune response Glycoproteins on surface of red blood cells o Enzymes Promote chemical reactions
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This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

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September 6-ch 5 - September 6, 2007 Chapter 5 Plasma...

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