Transport In Cells

• For an organism to function, substances must move into and out of cells.
• Three processes contribute to this movement - diffusion, osmosis and active transport.
• For an organism to function, substances must move into and out of cells.
• If there is a situation where particles of a substance are in a higher concentration, they will move from this region to where they are in a lower concentration, a process known as diffusion.
• Active transport is the movement of particles against a concentration gradient, where particles move from an area of higher concentration to an area of lower concentration.
• Osmosis is the movement of water across a semi-permeable membrane, where water moves from a region of higher water concentration to a region of lower water concentration.
• Diffusion, osmosis and active transport are three processes that contribute to the movement of substances into and out of cells.
• Diffusion is the movement of particles (molecules and ions) in a liquid and a gas, where particles move continuously and spread themselves evenly throughout a liquid or a gas.
• If there is a situation where particles of a substance are in a higher concentration, they will move from this region to where they are in a lower concentration, a process known as diffusion.
• Active transport is the movement of particles against a concentration gradient, where particles move from an area of higher concentration to an area of lower concentration.