Osmosis

• What is osmosis?

  The 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 happens to water in a dilute sugar solution?

  It has a high concentration of water
• What happens to water in a concentrated sugar solution?

  It has a low concentration of water
• What happens to water when a cell is placed in water?

  Water moves into the cell by osmosis
• What effect does osmosis have on an animal cell in water?

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

  Water moves out and the cell shrinks
• What happens to a plant cell in water?

  Water moves in and the cell becomes turgid
• What prevents a plant cell from bursting when it becomes turgid?

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

  Water moves out and the cell becomes flaccid
• 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
  • In concentrated solution: become flaccid
• How does osmosis differ in animal and plant cells?

  Plant cells have a cell wall preventing bursting