Diffusion: Movement of a substance from a high concentration to a low concentration, How oxygen enters the blood from the lungs, How carbon dioxide goes in and out of 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, Uses a protein to pump substances against their concentration gradient, Osmosis: Movement of water, Occurs through a semi-permeable membrane, How water enters roots from the soil, How water goes in and out of cells, Water moves from a high water potential to a lower water potential, Facilitated diffusion: Movement of a substance from a high to low concentration using a carrier or channel protein, Used to transport ions along their concentration gradient, Used to transport glucose and amino acids along their concentration gradient,

A level Cell transport

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