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Absorption (Electronegativity (Definition: ability to attract electrons,…

- - - - -high lipid solubility favors movement
  - - - Organic molecules with molecular weight less than 200
      - Tight junctions regulate paracellular movement
    - - Water - easy to pass through and can carry many xenobiotics
- - - - Enhance movement down an electrochemical gradient
        
        Carrier proteins bind chemically with the molecules or ion and moves them through the membrane
    - - Lipophilic molecules diffuse through lipid membrane
        
        Channel proteins form hydrophilic pores through the membrane to let in hydrophilic molecules