Gas and Solute Exchange

Gas and Solute Exchange

Substances move by diffusion, osmosis and active transport

Life processes need gases or other dissolved substances before they can happen

E.g. photosynthesis needs carbon dioxide and water in the plant cells and respiration needs glucose and oxygen in your cells

Waste substances need to move out of the cells to be got rid of

Diffusion - movement of a substance from high concentration to low concentration e.g. dissolved particles through a cell membrane

Osmosis - movement of water from high water concentration to low water concentration through a partially permeable membrane

Active transport - movement of a substance from low…