Cell Membrane

Card Set Information

Author:
chanchan27104
ID:
293849
Filename:
Cell Membrane
Updated:
2015-01-25 16:48:29
Tags:
biology
Folders:
BIO 183,Exam I,Cells I
Description:
MemBRAAAAAAAAINS
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  1. Cell Membrane Function
    • Separates the contents of the cell from its environment
    • Regulates he passage of molecules into and out of the cell
    • Allows some substances to cross more easily than others
  2. Phospholipid Bilayer
    • Amphipathic
    • Hydrophilic heads interact with water
    • Hydrophobic tails interact with each other
  3. Membrane Structure
    • Lipid Bilayers
    • Each membrane has a unique composition suited for a specific function
  4. Membrane Fluidity
    • Not Static
    • Phospholipids and proteins move laterally in a membrane
    • Proteins move more slowly than lipids or not at all
    • Must be fluid in order to function
    • Affected by temperature
  5. Membrane Fluidity and Temperature
    • Fluidity is affected by temperature
    • Cool temperatures: closely packed phospholipids; solid
    • Warm Temperatures: loosely packed phospholipids; fluid

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