Diffusion

• Diffusion is the spreading out of particles from an area of higher concentration to an area of lower concentration.
• Diffusion occurs in solutions and gases
• The bigger the concentration gradient (difference in concentration) the faster the diffusion rate
• Higher temperatures result in faster diffusion rate as particles have more energy
• Very small molecules such as oxygen, glucose, amino acids and water can move in and out of the cell membrane by diffusion.
• The larger the surface are the faster the diffusion rate as more particles can pass through at once