| A | B |
| calorie | the amount of energy needed to raise the temperature of 1 gram of water by 1 Celsius degree |
| glycolysis | first step in releasing the energy of glucose (molecule of glucose is broken into two molecules of pyruvic acid) |
| cellular respiration | process that releases energy by breaking down food molecules in the presence of oxygen |
| NAD+ | (nicotinamide adenine dinucleotide) electron carrier involved in glycolysis |
| fermation | process by which cells release energy in the absence of oxygen |
| anaerobic | process that does not require oxygen |
| aerobic | process that requires oxygen |
| Kreb's Cycle | second stage of cellular respiration, in which pyruvic acid is broken down into carbon dioxide in a series of energy-exrtracting reactions |
| Electron Transport Chain | a series of proteins in which the high-energy electrons from the Kreb's cycle are used to convert ADP into ATP |