diffusion

• Diffusion is the process by which molecules or ions spread out from an area of high concentration to an area of low concentration.
• Osmosis is the diffusion of water across a partially permeable membrane.
• <S>:The rate of diffusion depends on the concentration gradient, with movement occurring from higher to lower concentrations.
• Diffusion is the movement of particles from an area of high concentration to low concentration.
• non-permeable membranes do not allow any substances to pass through them at all
• the movement of molecules from a region of high concentration to a region of low concentration along a concentration gradient
• Active Transport is the transport of substances against their concentration gradient using energy (ATP)
• Osmosis - The movement of water molecules from a region of high water concentration to a region of low water concentration through Selectively permeable membrane
• Constantly moving liquid and gas molecules tend to move from an area of high concentration to an area of lower concentration
• Molecules move down a concentration gradient
• Concentration - The greater the concentration gradient the greater the diffusion rate
• Temperature - At higher temperatures molecules have more kinetic energy and so move and diffuse faster
• Pressure - molecules move quickly from an area of higher to lower pressure