Osmosis

• What is osmosis?

  Diffusion of water through a membrane
• What is the direction of water movement in osmosis?

  From dilute solution to concentrated solution
• What type of membrane allows osmosis to occur?

  Partially permeable membrane
• What does a dilute sugar solution contain a lot of?

  Water molecules
• What do scientists say about concentrated solutions?

  They contain a low concentration of water
• How does osmosis affect an animal cell placed in water?

  The cell expands and may burst
• What happens to an animal cell in a concentrated solution?

  Water moves out, causing the cell to shrink
• What is the effect of osmosis on a plant cell placed in water?

  The cell becomes turgid and expands
• What prevents a plant cell from bursting when it expands?

  The cell wall provides structural support
• What happens to a plant cell in a concentrated solution?

  Water moves out, causing the cell to shrink
• What are the effects of osmosis on animal and plant cells?

  • Animal cells:
  • In water: expand and may burst
  • In concentrated solution: shrink
  • Plant cells:
  • In water: become turgid and expand
  • In concentrated solution: become flaccid and shrink
• Where can you find questions on osmosis?

  In the vision workbook