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| Frage | Antworten |
| What is aerobic respiration? | Breaking down food using oxygen to release energy for cells. |
| Where in your cells does respiration take place? | Mitochondria |
| How does your body respond to increase demands for oxygen during exercise? | It increases in heart rate, in breathing rate and in depth of breathing. Glycogen stores in muscle are converted to glucose for cellular respiration. The blood flow to the muscle increases. |
| How is glycogen used in the body? | It increases the supply of glucose and oxygen to the muscle and remove more carbon dioxide. |
| Why do muscles use anaerobic respiration to obtain energy? | If muscles work hard for a long time they become fatigued and don't contract efficiently. If they don't get enough oxygen they will respire anaerobically. |
| Why is less energy released by anaerobic respiration than aerobic respiration? | The anaerobic breakdown of glucose releases less energy than aerobic respiration. |
| What is an oxygen debt? | The extra oxygen that must be taken into the body after exercise has stopped to complete the aerobic respiration of lactic acid. |
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