OSMOSIS

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OSMOSIS

• CELLS AND THEIR ENVIRONMENTS

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DIFFUSION

• The random movement of particles.

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DIFFUSION IS....

• Particles move from greater concentration to
  lesser concentration
• or from great to less

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KEY WORDS OF DIFFUSION

• PASSIVE TRANSPORT
• CONCENTRATION GRADIENT (HI -gt LOW)
• EQUILIBRIUM

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WHAT IS OSMOSIS????

• Osmosis is the movement of water across a
  differentially permeable membrane.

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WHAT CONDITIONS CAUSE OSMOSIS????
HYPOTONIC------ISOTONIC------HYPERTONIC
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• HYPOTONIC Water moves INTO the cell (like
  blowing up a balloon)
• ISOTONIC water moves both directions
• HYPERTONIC water moves out of the cell
  (dehydration)

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PASSIVE TRANSPORT

• Passive transport does NOT require energy by the
  cell
• osmosis diffusion
• facilitated diffusion

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Ion (gated) channels
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ACTIVE TRANSPORT

• CARRIER MOLECULES cell energy required!

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Endocytosis cell eating
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Exocytosis cell EXCRETING