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5 Cards in this Set

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Diffusion
the process by which molecules of a substance more from areas of higher concentration of a substance to areas of lower concentration
How do cells move material in and out?
diffusion
osmosisi
active transport
active transport
This requires energy from the cell to move material in or out of the cell regardless of the concentration. Substances that enter the cell through active transport are calcium, potassium and sodium
osmosis
a special type of diffusion: diffusion of water into or out of the cell from a place of higher concentration to a place of lower concentration
selectively permeable
permits only certain substances to enter and leave the cell