Osmosis, Active Transport & Diffusion

• Osmosis


  Is the movement of water molecules from an area of high concentrated water to an area of low concentration water through a partially permable membrane
• Animal cells


  Don not have a cell wall and bursts if too much water goes in this is calles lysis
• Isotonic


  Water leaves the cell at the same rate it goes in
• Hypotonic


  Water enters tge cell and it swells
• Hypertonic


  Water leaves the cell and it shrinks
• Percentage change in mass

  Change in mass / starting mass x 100
• Active transport


  Substances move from lower to high concentrated area which is against the concentration gradient
• Diffusion


  Is the movement of particles from a area of higher concentration to an area of lower concentration
• Factors affecting diffusion


  Surface area, tempreture, distance, difference in concentration