| A | B |
| cellular respiration | all chemical reactions that break down glucose and other food molecules and transfer the energy released to ATP |
| glycolysis | breaking down of glucose into two pyruvic acids and produces first step in respiration |
| Kreb's cycle | cycle of breaking down pyruvic acid and other carbon-based molecules to release their energy and hydrogen |
| respitory chain | chain on the cristae folds of mitochondria, releases energy of hydrogen |
| NAD and FAD | hydrogen energy carriers |
| aerobic | respiration that uses enzymes and oxygen to break down pyruvic acids, includes Kreb's cycle |
| anaerobic | uses enzymes that break down pyruvic acids without oxygen, includes fermentation and glycolysis |
| ethyl alcohol | 2 C2H5OH |
| Alcoholic fermentation | anaerobic respiration that yields ethyl alcohol, carbon dioxide, and energy |
| glucose | C6H12O6 |
| lactic acid | 2 C3H6O3 |
| lactic acid fermentation | breaks down glucose into lactic acid and energy, occurs in some microbes and muscle cells |
| mitochondria | sausage-shaped organelles, places where molecules derived from glucose react with oxygen to produce the cell's energy |
| metabolism | cell's process of deriving energy from its surroundings |