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9 Cards in this Set
- Front
- Back
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Cell theory |
• all living things are made of one or more cells • The cell is the smallest unit of life • all new cells come from pre-existing cells |
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Macromolecules |
Substances formed by joining many small molecules together |
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Passive transport |
The movement of substances through a cell membrane without using the cells energy |
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Diffusion |
The movement of substances from an area of higher concentration to an area of lower concentration |
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Osmosis |
The diffusion of water molecules on the through a membrane |
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Semipermeable cell membranes |
Allow water to pass through them until equilibrium occurs |
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Facilitated diffusion |
Occurs when molecules pass through a cell membrane using transport proteins |
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Carrier proteins |
Transport proteins at three large molecules through the cell membrane |
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Channel proteins |
Transfer proteins that form pores |
