Cell Membrane Lipid Bilayer

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Cell Membrane Lipid Bilayer Examples of Simple
Diffusion
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O2
O2
O2
Diffusion of Oxygen
O2
O2
O2
O2
O2
highest concentration
lowest concentration
lowest concentration
highest concentration
O2
O2
3
CO2
CO2
CO2
Diffusion of Carbon Dioxide
CO2
CO2
CO2
CO2
CO2
highest concentration
lowest concentration
lowest concentration
highest concentration
CO2
CO2
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Diffusion of Water - Osmosis
H2O
H2O
H2O
H2O
H2O
H2O
H2O
H2O
highest concentration
lowest concentration
lowest concentration
highest concentration
H2O
H2O
cytoplasmic side low osmotic pressure
cytoplasmic side high osmotic pressure
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Which way will the particles diffuse?
solution
cell
cell
cell
particles
water
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Which way will the water diffuse?
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Isotonic, Hypotonic, Hypertonic
Isotonic
Hypertonic
Hypotonic
Red blood cell and solution are same
Solution has more particles
Red blood cell has more particles
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diffusion of particles
diffusion of water
hypertonic
hypotonic
hypotonic
hypotonic
hypertonic
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Largest particles cant get through the lipid
bilayer
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Facilitated Diffusion Channel Protein (always
open)
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Channel proteins are selective as to what can get
through them.
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Facilitated Diffusion Carrier Protein (opens
closes)
No Energy Is Necessary!!!
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Active Transport Using a Carrier Protein
extracellular side
cytoplasmic side
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Active Transport Taking in Large Amounts of
Substances
endocytosis
exocytosis