diffusion and osmosis

• diffusion is the random and net movement of particles from an area of higher concentration to an area of lower concentration
• the bigger the concentration gradient ( the difference in concentration), the faster the diffusion rate
• particles like oxygen and glucose particles, diffuse into the cell through the cell membrane.
• the larger the surface area of the cell membrane, the faster the diffusion rate, because more particles can pass through at once
• osmosis is the movement of water molecules across a partially permeable membrane from an area of higher water concentration to an area of lower water concentration
• in the practical, it was seen that the potato put into the higher concentrated sugar solution had decreased in mass, because water had diffused out of them and into the solution, because it had a lower water concentration.