DIffusion, Osmosis, Photosynthesis, Cell Respiration Tools A B What passes through the cell membrane water, oxygen, salts, and some waste products diffusion the tendency for a substance to move from an area of greater concentration to one of lesser concentration Cells are mostsly what substance? Water osmosis maintaining the balance of water inside and outside of the cell cell transport The ability of substances to move through the cell membrane Result of energy being released from food build up of waste products Amount of energy cell needs for diffusion No Energy Amount of energy needed to move necessary chemicals into the cell Some Energy Carbon dioxide & water & light = Sugar and oxygen Where cells obtain their energy? From food Chlorophyll Green chemical found in chloroplasts Function of chloroplasts Ability to absorb the sun's energy Photosythesis Process by which light energy is used to make food Waste product of photosynthesis Oxygen Gas needed for photosynthesis Carbon dioxide Producers Organisms that carry out photosynthesis Cell respiration The process of using oxygen to release stored energy by breaking down sugar molecules Fermentation Obtaining energy from sugar via oxygen and other chemical processes Sugar & oxygen = Carbon dioxide & Water & Energy Lactic Acid Waste product of fermentation