Osmosis

• What is osmosis?

  The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane. (high to low)
• What is the direction of water movement in osmosis?

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

  Partially permeable membrane
• What happens to an animal cell placed in pure water?

  The cell expands and may burst
• What is the effect of osmosis on a plant cell in pure water?

  The cell becomes turgid and swollen
• How does osmosis affect an animal cell in a concentrated solution?

  Water moves out, causing the cell to shrink
• What is the term for a plant cell that has lost water and shrunk?

  The cell is flaccid
• What prevents a plant cell from bursting when it becomes turgid?

  The cell wall provides structural support
• What are the key points about osmosis in cells?

  • Osmosis is the diffusion of water.
  • It occurs through a partially permeable membrane.
  • In animal cells, water can cause expansion or shrinkage.
  • In plant cells, water causes turgidity or flaccidity.
• Where can you find questions on osmosis?

  In the vision workbook
• What is the concentration of water in a dilute solution?

  High concentration of water
• What is the concentration of water in a concentrated solution?

  Low concentration of water
• How does the concentration of sugar affect osmosis in solutions?

  Higher sugar concentration means lower water concentration
• What happens to water molecules during osmosis across a membrane?

  Water molecules diffuse through the membrane
• If an animal cell is placed in a concentrated sugar solution, what will happen?

  Water will move out, cell shrinks
• If a plant cell is placed in a concentrated solution, what is the result?

  Water moves out, cell becomes flaccid
• What is the role of the cell wall in plant cells during osmosis?

  It prevents the cell from bursting
• What is the term used when a plant cell becomes swollen due to water intake?

  Turgid
• What is the term used when a plant cell loses water and shrinks?

  Flaccid