the movement of particles from regions of higher density to regions of lower density
diffusion of water through a selectively permeable membrane
the movement of substances through a cell membrane without the use of energy by the cell
the movement of materials through a cell membrane using energy
the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell
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 the cell membrane
the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce food and oxygen
the process by which cells use oxygen to produce energy from food
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