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Diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration
Examples of diffusion
gaseous exchange, osmosis, nutrients into ileum
Osmosis
Diffusion of water through a semi-permeable membrane
what happens to animal cells in pure water?
they burst
Plasmolysis
Collapse of a plant cell's cytoplasm due to a lack of water
turgid cell
Firm cell due to water gained by osmosis
Active transport
the movement of materials through a cell membrane against the concentration gradient using energy
examples of active transport
Root hairs absorbing minerals and water, glucose taken from the gut and kidney