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Chap 3 - Science
7th Grade Science Chapter 3 - Cell Processess
| Question | Answer |
|---|---|
| mixture | 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. |
| organic compound | compounds that always contain hydrogen and carbon; carbohydrates, lipids, proteins, and nucleic acids are organic compounds found in living things |
| enzyme | a type of protein that regulates nearly all chemical reactions in cells; a type of protein that speeds up chemical reactions in the body without being changed or used up itself |
| inorganic compound | compound, such as H2O that is made from elements other than carbon and whose atoms usually can be arranged in only one structure |
| passive transport | movement of substances through a cell membrane without the use of cellular energy; includes diffusion, osmosis, and facilitated diffusion |
| diffusion | 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 |
| equilibrium | occurs when molecules of one substance are spread evenly throughout another substance |
| osmosis | a type of passive transport that occurs when water diffuses through a cell membrane |
| active transport | energy-requiring process in which transport proteins bind with particles and move them through a cell membrane |
| endocytosis | process by which a cell takes in a substance by surrounding it with the cell membrane |
| exocytosis | process by which vesicles release their contents outside the cell |
| metabolism | the total of all chemical reactions in a organism |
| photosynthesis | 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 |
| cellular respiration | process by which producers and consumers release stored energy from food molecules; series of chemical reactions used to release energy stored in food molecules |
| fermentation | 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 |
Created by:
dcaeschliman
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