| A | B |
| the release of energy from food | respiration |
| needs oxygen | aerobic respiration |
| C6H12O6 | glucose |
| 79% of the air is | nitrogen |
| 20% of the air we breathe in is | oxygen |
| we breathe out | 16% oxygen |
| the % of CO2 in the air | 0.04 |
| CO2 | turns limewater milky |
| cobalt chloride paper | turns pink in the presence of water |
| cobalt chloride paper is blue | when there is no water present |
| respiration without oxygen is | anaerobic |
| anaerobic respiration in animals causes | cramp |
| lactic acid build up | causes cramp |
| the fitter you are | the shorter the time for your pulse to return to resting rate |
| yeasts are | unicellular organisms |
| anaerobic respiration in yeast | is called fermentation |
| when yeast respires anaerobically (without oxygen) | alcohol is produced |
| when animals respire anaerobically they produce | lactic acid |