diffusion

• Diffusion occurs from an area of higher concentration to an area of lower concentration
• What is diffusion defined as in biology?

  Net movement of particles
• Diffusion results in an even distribution of particles in a given space.
• Diffusion can occur in both gases and liquids
• What does the term "net movement" mean in the context of diffusion?

  Overall movement of particles
• Spraying perfume demonstrates diffusion in gases.
• What happens when food coloring is added to water?

  It diffuses evenly
• Cell membranes are partially permeable
• Which type of molecules can diffuse through a cell membrane?

  Small molecules
• Water, glucose, and amino acids can diffuse through cell membranes.
• Why can't proteins diffuse through cell membranes?

  They are too large
• Diffusion is a passive process because it requires no energy
• What is the first factor affecting the rate of diffusion?

  Concentration gradient
• A larger concentration gradient results in a higher rate of diffusion.
• Higher temperatures increase the energy of particles, causing them to move faster
• How does temperature affect the rate of diffusion?

  Higher temperature increases rate
• A larger surface area increases the rate of diffusion.
• Why does a larger surface area increase the rate of diffusion?

  More particles can diffuse
• Match the factor affecting diffusion with its effect:

  Concentration gradient ↔️ Higher difference increases rate

  Temperature ↔️ Higher temperature increases rate

  Surface area ↔️ Larger area increases rate