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Hrincevich_CH_4_student_outline

Hrincevich_CH_4_student_outline - Cell Membrane Structure...

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Cell Membrane Structure and Function Chapter 4
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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
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Main component of cell membranes Gives membrane its fluid properties Fatty acid tails sandwhiched between hyrdophilic heads Lipid Bilayer lipid bilayer fluid fluid
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Membrane Function Selectively isolates inside of the cell from the outside Regulates exchange of substances in and out of the cell Facilitates communication w/ other cells
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Fluid Mosaic Model Membrane is a mosaic of phospholipids glycolipids sterols proteins Most phospolipids and some proteins can drift through membrane
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Membrane Proteins active transporters receptor protein adhesion protein communication protein passive transporter recognition protein
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Membrane Experiments Split memebranes reveal embedded proteins
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Membrane Proteins Transport proteins: regulate movement through membrane Channel proteins Carrier proteins Receptor proteins: trigger cellular response when specific mols attach Recongnition proteins: ID tags and attachment sites glycoproteins
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