Cell Transport

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Cell Transport

• Fun fun fun!

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Cell transport

• Through cell membrane
• Lipid bilayer
• Selectively permeable
• 4 types
• Diffusion
• Osmosis
• Facilitated diffusion
• Active transport

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Cell transport

• Diffusion
• No use of energy
• stuff moves from an area of high concentration
  to an area of low concentration.
• Will move until equilibrium is reached
• When is equilibrium reached?

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Cell Tranport

• Diffusion

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Cell transport

• Osmosis
• Diffusion of water
• Water will move across the
• membrane until equilibrium
• is reached.
• When will it equilibrium
• be reached?

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Cell transport

• Isotonic solution
• Cell will stay the same. Water will not move in
  nor out.

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Cell transport

• Hypotonic solution
• Cell will swell
• Water will move into the cell.
• This can cause the cell to burst.

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Cell transport

• Hypertonic solution
• Water will move out of the cell.
• This will cause the cell to shrink.
• This can also cause the cell to die.

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Cell transport

• Facilitated diffusion.
• Some molecules can not move across the cell
  membrane. So how do they move in and out?
• Protein channels are used.
• These work as gates to get in and out of the
  cell.
• Movement is still from an area of high
  concentration to an area of low concentration.

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Cell transport

• Active transport
• Materials move against the concentration
  gradient.
• Moves from low concentration to high
  concentration.
• How can the cell do this?
• It must use energy. Its ACTIVE
• Uses carrier proteins
• When large particles move in Phagocytosis
• When large particle move out-Exocytosis

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Cell transport
Active transport Facilitated Diffusion