| A | B |
| calorie | the amount of energy needed to raise the temperature of 1 gram of water 1 celisius degree |
| glycolysis | is the process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid. |
| cellular respiration | is the process that releases energy by breaking down food molecules in the presence of oxygen |
| NAD+ | is an electron carrier that helps pass energy from glucose to other pathways |
| fermentation | releases energy from food molecules in the absense of oxygen |
| anerobic | means "not in air", oxygen is not part of the process. |
| aerobic | when the pathways of cellular respiration require oxygen |
| Krebs cycle | pyruvic acid is broken down into carbon dioxide in a serioes of energy-extracting reactions |
| electron transport chain | uses the high energy electrons from the Krebs cycle to convert ADP into ATP |