Diffusion

• What is diffusion?

  Movement of molecules from high to low concentration
• Which factors affect diffusion?

  Concentration gradient, temperature, and surface area
• In which direction do molecules move during diffusion?

  From high to low concentration
• What increases the rate of diffusion?

  Larger surface area
• What type of molecules typically diffuse through a cell membrane?

  Small, non-polar molecules
• What happens to the concentration of molecules during diffusion?

  It becomes uniform throughout the area
• How is the movement of oxygen in and out of cells best described?

  Diffusion
• What effect does increasing the temperature have on diffusion?

  Increases the rate of diffusion
• How does the concentration gradient affect the rate of diffusion?

  A steeper gradient increases the rate
• In which part of the cell does diffusion mainly occur?

  Cytoplasm