Osmosis

• How is diffusion defined?

  Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
• What happens to oxygen or glucose molecules during diffusion?

  They diffuse down their concentration gradient into a cell.
• What is osmosis?


  Osmosis is the diffusion of water molecules across a partially permeable membrane.
• What is the definition of osmosis?

  Osmosis is the net movement of water molecules from a region of higher water concentration to a region of lower water concentration.
• What does the term "water concentration" refer to?

  Water concentration refers to the amount of water compared to other dissolved molecules like sugars or salts.
• What are the molecules dissolved in water called?

  They are called solutes.
• How does the concentration of solutes affect water concentration in a solution?

  • Higher solute concentration means lower water concentration.
  • Lower solute concentration means higher water concentration.
  • It's the proportion of water to solutes that determines concentration, not the volume of water.
• If one beaker has one solute particle and another has three, which beaker has a higher concentration of solutes?

  The beaker with three solute particles has a higher concentration of solutes.
• What does a higher concentration of solutes imply about water concentration?

  A higher concentration of solutes implies a lower concentration of water.
• How does osmosis occur in relation to a cell's environment?

  • Water moves from an area of higher water concentration (outside the cell) to an area of lower water concentration (inside the cell).
  • This occurs through the cell's partially permeable membrane.
• What is the water concentration inside the cell compared to the outside in the given example?

  The inside of the cell has a lower water concentration compared to the outside.
• What drives the movement of water particles into the cell?

  The difference in water concentration drives the movement of water particles into the cell.
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