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Cells (Organelles (Ribosomes (Structure: dense particles; free or attached…

- - - - Simple Diffusion
        
        Movement down a concentration gradient until equilibrium reached; pass through membrane
        
        No cell energy required
        
        Small uncharged particles
      - Facilitated Diffusion
        
        Movement down a concentration gradient until equilibrium reached; pass through protein
        
        No cell energy required
        
        Larger particles, charged particles
      - Active Transport
        
        Movement against a concentration gradient; pass through protein
        
        Cell energy required (ATP)
        
        Variety of substances
- - - - Drinking cell; takes in liquids
      - Non-selective
    - - Receptors recognize material and bind with them
      - Selective
    - - Eating cell; phagocytes engulf entire cell, cell debris, or pathogen
      - Selective