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Science Vocab
Term | Definition |
---|---|
diffusion: | the movement of particles from regions of higher density to regions of lower density. |
osmosis: | the diffusion of water through a semipermeable membrane |
passive transport: | the movement of substances across a cell membrane without the use of energy by the cell. |
active transport: | the movement of substances across the cell membrane that requires the cell to use energy. |
endocytosis: | the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell. |
exocytosis: | the process in which a cell releases a particle by enclosing the particle in a vesicle that then moves to the cell surface and fuses with cell membrane. |
photosynthesis: | the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food. |
cellular respiration: | the process by which cells use oxygen to produce energy from food. |
fermentation: | the breakdown of food without the use of oxygen. |