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ch. 3 cells E and P
| word | definition |
|---|---|
| elements | any substance that cannot be broken down into simpler substances |
| compound | when two or more elements combine chemically, they form a compound |
| carbohydrate | an energy rich organic compound made of C, H, and O |
| lipids | fats oils and waxes |
| proteins | large molecules made of carbon, hydrogen , oxygen, nitrogen, and sometimes Sulfur |
| amino acids | |
| selectively permeable | some substances can pass through the cell membrane, while others cannot. |
| diffusion | the main method by which small molecules move across the cell membrane |
| Osmosis | cells cannot function properly without adequate water, many cellular processes depend on osmosis. |
| passive transport | the movement of dissolved materials through a cell membrane without using cellular energy is called passive transport |
| active transport | it requires the cell to use its own energy while passive transport does not. |
| photosynthesis | photo is Greek which means light, and synthesis means putting together |
| autotroph | an organism that cannot make its own food |
| heterotroph | obtain food by eating other organisms |
| pigments | colored chemical compounds that absorb light |
| chlorophyll | the main photosynthetic pigment in chloroplasts |
| stomata | carbon dioxide enters the plant through small openings on the underside of the leaves |
| respiration | the process which cells obtain energy from glucose. |
| Fermentation | is an energy-releasing process that does not require oxygen |
Created by:
catherine6900
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