Osmosis

• What is the main topic of today's video?

  The video discusses osmosis and its application to cells.
• What is diffusion?


  Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
• How do oxygen and glucose molecules move into a cell?


  They diffuse down their concentration gradient into the 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 solutes?

  Solutes are the molecules like sugars or salts that are dissolved in water.
• 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.
• 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 determines the concentration of water in a solution?


  The proportion of water compared to solutes determines the 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 movement occurs across a partially permeable membrane.
• What is found inside the cell in terms of water and solutes?

  Inside the cell, there are many water particles and some solute particles.
• What is the water concentration like outside the cell in the given example?


  The outside of the cell has a higher water concentration because it has almost pure water with few solute particles.
• What happens to water particles due to the concentration difference between the inside and outside of the cell?

  Water particles will diffuse from the outside of the cell into the cell.