Diffusion: movement of a substance from a high concentration to a low concentration, how oxygen enters blood from the lungs, how carbon dioxide leaves cells, Active Transport: movement of a substance from a low concentration to a high concentration using a pump and energy, how glucose moves from the small intestine into the blood, how mineral ions more from the soil into a cell, cells adapted for this have lots of mitochondria to release energy, Osmosis: movement of water, from a dilute solution to a concentrated solution, occurs through a semi-permeable membrane, how water enters roots from the soil, how water enters and leaves cells,

cell transport

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