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Chapter 7, Passive transport, Membrane proteins, Active transport, Fluid…

- - - - Channel proteins
        
        Ion channels that respond to a stimulus
      - Carrier proteins
- - - - Hypotontic
        
        Less solutes
      - More solutes
- - - - Transmembrane
        
        Span the entire lenght of the membrane
      - Not embedded in the membrane at all only to the surface
- - - - Signal transduction
        
        Cell-cell recognition
        
        Attachment to cytoskeleton
        
        Simple anchor points for the cytoskeleton to attach to cell membrane
        
        Glyco-proteins are used ad IDs within cells to recognize and foreign intruders
        
        Relays signals from the outside of the cell to inner
      - Built into membrane used to to carry out metabolic activity
- - - - Both polar and nonpolar
  - - - More cholesterol
        
        Reduces fluidity at moderate temperatures but at low hinders solidifcation
      - Prevent packing enhancing fluidity
- - - - Nonpolar