IGCSE Biology chapter 3 - Movement in and out of cells

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8 Terms

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Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration

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Examples of diffusion

gaseous exchange, osmosis, nutrients into ileum

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Osmosis

Diffusion of water through a semi-permeable membrane

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what happens to animal cells in pure water?

they burst

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Plasmolysis

Collapse of a plant cell's cytoplasm due to a lack of water

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turgid cell

Firm cell due to water gained by osmosis

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Active transport

the movement of materials through a cell membrane against the concentration gradient using energy

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examples of active transport

Root hairs absorbing minerals and water, glucose taken from the gut and kidney