Osmosis - Movement of water molecules across a selectively permeable membrane from an area of high water concentration to low water concentration, against the concentration gradient., Phospholipids - make up part of the cell membrane, Proteins - make up part of the cell membrane, some are used in active transport., Passive transport - Movement of molecules down the concentration gradient. Does not require energy., Active Transport - Movement of molecules or ions against the concentration gradient. Requires energy and membrane proteins., Diffusion - Movement of molecules from a region of high concentration to a region of low concentration, down the concentration gradient., Concentration gradient - difference in concentration between two areas., Turgid - the appearance of a plant cell that has gained water by osmosis, Plasmolysed - the appearance of a plant cell that has lost water by osmosis, Shrunk - The appearance of an animal cell that has lost water by osmosis., Burst - the appearance of an animal cell that has gained water by osmosis and has no cell wall to keep the cell intact., Substances that will move into human cells by diffusion - Oxygen and Glucose,

N5 Transport Across Membranes

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