Osmosis

• What is the focus of today's video?

  Osmosis and water concentration
• 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 is the definition of osmosis?

  Net movement of water from high to low concentration
• What does water concentration refer to?

  Amount of water compared to solutes
• What are solutes?

  Molecules like sugars or salts dissolved in water
• How does solute concentration affect water concentration?

  • Higher solute concentration = lower water concentration
  • Lower solute concentration = higher water concentration
• If one beaker has one solute particle and another has three, which has higher solute concentration?

  The beaker with three solute particles
• What determines the concentration of water in a solution?

  The proportion of water compared to solutes
• How does osmosis apply to cells?

  • Inside cell: high water, some solutes
  • Outside cell: almost pure water, few solutes
  • Water moves into cell from higher to lower concentration
• What happens to water particles in a cell with lower water concentration?

  Water diffuses into the cell from outside
• What is the role of the cell's partially permeable membrane in osmosis?

  It allows selective movement of water molecules
• What is the concentration gradient in osmosis?

  Difference in water concentration across a membrane
• Who is the presenter of the video?

  Amadeus
• What resources are available for further learning?

  • Free learning platform with videos
  • Practice questions to reinforce learning
  • Progress tracking for sciences and maths
• Where can you find the link to the lesson for this video?

  In the description below the video
• What is the purpose of the playlist mentioned in the video?

  To organize videos for the subject