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 as solute concentration increases
• How does osmosis apply to cells?

  • Water moves from outside to inside the cell.
  • Higher water concentration outside means water diffuses in.
  • This occurs through a partially permeable membrane.
• What is the role of the cell's partially permeable membrane in osmosis?

  It allows water to diffuse while blocking solutes
• What does a higher water concentration outside a cell indicate?

  Water will diffuse into the cell
• What is the process called when water moves from high to low concentration?

  Osmosis