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Definition
| A type of passive transport in cells in which molecules move from areas where there are more of them to areas where there are fewer of them. |
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| Energy-requiring process in which transport proteins bind with particles and move them through a cell membrane. |
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| Process by which a cell takes in a substance by surrounding it with the cell membrane. |
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| Occurs when molecules of one substance are spread evenly throughout another substance. |
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| Process by which vesicles release their contents outside the cell. |
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Definition
| A type of protein that regulates nearly all chemical reactions in cells. |
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Definition
| Compound, such as H2O, that is made from elements other than carbon and whose atoms usually can be arranged in only one structure. |
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Definition
| Process by which oxygen-lacking cells and some one-celled organisms release small amounts of energy from glucose molecules and produce wastes such as alcohol, carbon dioxide, and lactic acid. |
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| The total of all the chemical reactions in an organism. |
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| A combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties: can be gases, solids, liquids, or any combination of them. |
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Definition
| Compounds that always contain hydrogen and carbon; carbohydrates, lipids, proteins, and nucleic acids are organic compounds found in living things. |
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Definition
| A type of passive transport that occurs when water diffuses through a cell membrane. |
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Definition
| Movement of substances through a cell membrane without the use of cellular energy; includes diffusion, osmosis, and facilitated diffusion. |
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Definition
| Process by which plants and many other producers use light energy to produce a simple sugar from carbon dioxide and water and give off oxygen. |
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Definition
| Process by which producers and consumers release stored energy from food molecules; series of chemical reactions used to release energy stored in food molecules. |
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