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2.1 Cell Structure - Coggle Diagram

- - - - System of membranes containing fluid filled cavities coated in ribosomes.
      - Intracellular transport system cisternae form channels for transporting substances to other parts of cell.
    - - System of membranes containing fluid filled cavities but have no ribosomes.
      - Contains enzymes that catalyse reactions involved with lipid metabolism:
        -Synthesis of cholestrol
        -Synthesis of lipids
        -Synthesis of steroid hormones
        Involved in absorption, synthesis and transport of lipids.
- - - - Relatively Cheap
      - Easy to use
      - Portable
      - Can study whole living specimens
      - Allow magnification of up to x1500 and x2000
      - Resolution is limited, they cannot magnify any higher without giving a clear image
    - - Use laser light to scan object point by point and displayed on a computer screen.
      - High resolution and show high contrast
      - Depth selectivity and can focus on structures at different depths
      - Used in medical professions
    - - Transmission electron microscopes
        
        Chemically fixed by being dehydrated and stained.
        
        Beam of electrons passes through the specimen
      - Scanning electron microscopes
        
        Large and very expensive
        
        Need a great deal of skill and training to use