CH 4 Outline

CH 4 Outline - Cell Membrane Structure and Function Chapter...

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Unformatted text preview: Cell Membrane Structure and Function Chapter 4 Cystic Fibrosis Caused by defective protein channel (CFTR) in epithelial cells Not enough CL- and water cross membranes Thick mucus clogs airways and ducts throughout body Usually fatal by age 30 Main component of cell membranes Gives membrane its fluid properties Fatty acid tails sandwiched between hydrophilic heads Lipid Bilayer lipid bilayer fluid fluid Membrane Function 1. Selectively isolates inside of the cell from the outside 2. Regulates exchange of substances in and out of the cell 3. Facilitates communication with other cells Fluid Mosaic Model Membrane is a mosaic of Phospholipids Glycolipids Sterols Proteins Most phospholipids and some proteins can drift through membrane Membrane Proteins active transporters receptor protein adhesion protein communication protein passive transporter recognition protein Membrane Experiments Split membranes reveal embedded proteins Membrane Proteins Transport proteins: regulate movement through membrane Channel proteins Carrier proteins Receptor proteins: trigger cellar response when specific molecules attach Recognition proteins: ID tags and attachment sites Glycoproteins...
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This note was uploaded on 03/03/2009 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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CH 4 Outline - Cell Membrane Structure and Function Chapter...

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