osmosis

• What is osmosis?

  The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane
• How does osmosis differ from diffusion?

  Osmosis specifically refers to the movement of water, while diffusion refers to the movement of any particles
• What happens to an animal cell placed in pure water?

  The cell expands and may burst due to water moving in by osmosis
• What is the effect of placing an animal cell in a concentrated solution?

  Water moves out of the cell by osmosis, causing the cell to shrink
• What is a key characteristic of the cytoplasm of cells?

  It is a relatively concentrated solution with a low concentration of water
• What happens to a plant cell when placed in water?

  The cell expands and becomes turgid due to water moving in by osmosis
• Why does a plant cell not burst when it becomes turgid?

  The cell wall prevents the plant cell from bursting
• What occurs when a plant cell is placed in a concentrated solution?

  Water moves out of the cell by osmosis, causing the cell to shrink
• What term is used to describe a plant cell that has become swollen due to osmosis?

  Turgid
• What term is used to describe a plant cell that has shrunk due to osmosis?

  Flaccid
• What are the key points about osmosis in animal and plant cells?

  • Animal cells expand and may burst in pure water
  • Animal cells shrink in concentrated solutions
  • Plant cells become turgid in pure water due to cell wall
  • Plant cells become flaccid in concentrated solutions
• What is the definition of a partially permeable membrane?

  • A membrane that allows some molecules to pass through
  • Water molecules can pass, but sugar molecules cannot
• What is the difference between dilute and concentrated solutions in terms of water concentration?

  • Dilute solutions have a high concentration of water
  • Concentrated solutions have a low concentration of water
• What is the significance of osmosis in biological systems?

  • Essential for maintaining cell turgor in plants
  • Influences cell shape and function in animals