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Chapter 9 Biology
Ch. 9
| Term | Definition |
|---|---|
| Fermentation | process by which cells release energy in the absence of oxygen |
| Lactic Acid Fermentation | process carried out by lactic acid bacteria when oxygen is not present |
| calorie | amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius |
| cellular respiration | process that releases energy from food in the presence of oxygen |
| aerobic | process of cellular respiration that requires oxygen |
| anaerobic | process that doesn't require oxygen |
| glycosis | first set of reactions in cellular respiration in which a molecule of glucose is broken into two molecules of pyruvic acid |
| NAD+ | electron carrier |
| Krebs cycle | broken down into carbon dioxide in a series of energu-extracting reactions |
| matrix | innermost compartment of the mitochondrion and the site of the Krebs cycle reactions |
| where do organisms get energy? | from food |
| cellular respiration equation | oxygen + glucose -> carbon dioxide + water+ energy |
| what is the relationship between photosynthesis and cellular respiration? | photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. photosynthesis releases oxygen into the atmosphere and cellular respiration uses that oxygen to release energy from food |
| what happens during the process of glycolysis? | during glycolysis, 1 molecule of glucose, 6-carbon compound, is transformed into 2 molecules of pyruvic acid, a 3-carbon compound |
| what happens during the Kreb cycle? | pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions |
| how does the electron transport chain use high-energy electrons from glycolysis and the Krebs cycle? | uses high-energy electrons from glycolysis and the Krebs cycle to convert ADP into ATP |
| how much ATP does cellular respiration generate? | together, glycolysis, the Krebs cycle, and the electron transport chaine release about 36 molecules of ATP per molecule of glucose |
| how do organisms generate energy when oxygen is not available? | fermentation releases energy from food molecules by producing ATP |
| how does the body produce ATP during different stages of exercise? | the body uses ATP already in muscles as well as ATP made by lactic acid fermentation & for exercise longer than about 90 sec. cellular respiration is the only way to continue generating a supply of ATP |
| organisms obtain the energy they need from the breakdown of food molecules by what? | cellular respiration and fermentation |