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COMPARE/CONTRAST the kinds of transport Active or Passive What does it use to help? Membrane proteins? Vesicles? Needs no help? Example of substances that use this kind of transport in cells DIFFUSION PASSIVE NO HELPER Oxygen & Carbon dioxide FACILITATED DIFFUSION CARRIER PROTEINS PASSIVE Membrane proteins Glucose FACILITATED DIFFUSION AQUAPORINS (OSMOSIS) PASSIVE Membrane proteins Water FACILITATED DIFFUSION ION CHANNELS PASSIVE Membrane proteins Ions: Na+, K+, Ca++, Cl- ACTIVE Membrane proteins Moves 3 Na+ out of cells & 2 K+ into cells ACTIVE Membrane proteins H+ ions Na+ - K+ PUMP PROTON PUMP ENDOCYTOSIS (phagocytosis) ACTIVE Vesicles ENDOCYTOSIS (pinocytosis) ACTIVE Vesicles Exocytosis ACTIVE Vesicles Large molecules/whole cells Used by white blood cells to destroy bacteria Small molecules/fluids Any substance leaving cells Used by Golgi bodies to export molecules