Osmosis

• What is diffusion?

  Net movement of particles from high to low concentration
• How do oxygen and glucose molecules enter a cell?

  By diffusing down their concentration gradient
• What is osmosis?

  Diffusion of water molecules across a membrane
• What defines osmosis in terms of water concentration?

  Movement from higher to lower water concentration
• What are solutes?

  Molecules dissolved in water, like sugars or salts
• How does water concentration relate to solutes?

  • Water concentration is the amount of water compared to solutes.
  • Higher solute concentration means lower water concentration.
  • It's about the proportion of water to solutes, not volume.
• If one beaker has one solute particle and another has three, which has higher solute concentration?

  The beaker with three solute particles
• What happens to water concentration when solute concentration increases?

  Water concentration decreases
• How does osmosis apply to cells?

  • Inside the cell: high water and solute concentration.
  • Outside the cell: higher water concentration, fewer solutes.
  • Water moves into the cell from higher to lower water concentration.
• What is the role of the cell's partially permeable membrane in osmosis?

  It allows water to diffuse while blocking solutes
• What is the result of water moving into a cell during osmosis?

  Increased water concentration inside the cell
• What is the main takeaway about osmosis from this video?

  Water moves from high to low concentration
• What resources are available for further learning on this topic?

  • Learning platform with videos and questions
  • Progress tracking for sciences and maths
  • Playlist of related videos