Biological Membranes5 [Compatibility Mode]

Biological Membranes5 [Compatibility Mode] - 9/9/2007 UNIT...

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9/9/2007 1 What Is the Structure of a Biological Membrane? What adaptive significance do membranes play? UNIT GOALS How Is the Plasma Membrane Involved in Cell Adhesion and Recognition? What Are the Passive Processes of Membrane Transport? How Do Substances Cross Membranes Against a Concentration Gradient? How do cells utilize the endomembrane system? What Are Some Other Functions of Membranes?
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9/9/2007 2 MEMBRANE STRUCTURE Lipid Bilayer Polar Head 2 Hydrophobic Tail 2 Hydrophobic Tails Adaptive Role and Evolutionary Significance Membranes allowed for the compartmentalization of reaction chambers. Out of this compartmentalization came the abilitiy to regulate pH, [salts], and (eventually) temperature.
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9/9/2007 3 THE FLUID MOSAIC MODEL Lipids and proteins interact in a NON COVALENT MANNER Allows for the horizontal movement of various molecules about the face of the membrane Membrane rafts develop due to complex intermolecular interactions
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This note was uploaded on 04/07/2008 for the course BIOSCI 0050 taught by Professor Carollafarve during the Fall '07 term at Pittsburgh.

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Biological Membranes5 [Compatibility Mode] - 9/9/2007 UNIT...

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