GHSGT List 7

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GHSGT List 7
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List 7

• Diffusion 7. facilitated
• Osmosis diffusion
• Selectively permeable 8. active
• Hypotonic transport
• Hypertonic 9. passive
• Isotonic transport
• 10. endocytosis

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Diffusion

• Movement of a substance from an area of high
  concentration to an area of low concentration
  until equilibrium (balance) is reached .
• Ex When someone uses a perfume in class the
  people around them smell it first (high
  concentration) and then over a period of time the
  odor diffuses until everyone smells it.

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2. Osmosis

• Movement of WATER from an area of high
  concentration to an area of low concentration
  until equilibrium is reached.
• Ex Water will travel out of a cell if the cell
  is placed in a salt water solution.

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3. Selectively Permeable

• Membranes allow only certain substances to pass
  through them.
• EX Osmosis is the diffusion of water through a
  selectively permeable membrane.

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4. Hypotonic

• Having a concentration LOWER than another
• If a cell containing 25 salt is placed in a
  beaker containing a 50 salt solution then the
  cell is said to be HYPOTONIC compared to the
  beaker solution.

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5. Hypertonic

• Having a concentration HIGHER than another
• Using the same 25 salt solution cell and a 50
  salt solution in the beaker, the BEAKER solution
  is HYPERTONIC compared to the cell.

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6. Isotonic

• Having a concentration that is EQUAL to that of
  the surroundings.
• If a 25 salt solution cell is placed in a beaker
  containing 25 salt then the cell is isotonic to
  its environment.

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7. Facilitated Diffusion

• Movement of substances across a cell membrane
  with the help of protein channels. Used for
  substances that are too large to pass directly
  through the membrane.
• EX glucose can diffuse directly through the cell
  membrane by the use of a specific protein channel.

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8. Active Transport

• Process that REQUIRES ENERGY to move materials
  across a cell membrane.
• EX phagocytosis and pinocytosis

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9. Passive Transport

• Process that does NOT REQUIRE ENERGY to move
  substances across a cell membrane.
• Ex osmosis and diffusion

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10. Endocytosis

• Process of taking particles into a cell.
• EX pinocytosis and phagocytosis