Exercise
- Created by: chelsey866
- Created on: 07-03-14 19:53
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- Exercise
- Exercise increases the heart rate
- Your muscle cells use oxygen to release energy from glucose- they respire aerobically
- The energy is used to contract the muscles
- When you exercise:
- Your muscle cells need more oxygen and glucose
- Extra carbon dioxide needs to be removed from the muscle cells
- For these things to happen, the blood has to flow at a faster rate
- This is why you exercise:
- Increase your breathing rate
- Increases your heart rate
- Makes you breathe more deeply
- Glycogen is used during exercise
- 1) your muscles store glucose as glycogen
- 2) During hard exercise, molecules use glucose quickly
- 3) some of the stored glycogen is changed back to glucose to give more energy
- Anaerobic respiration is used if there's not enough oxygen
- 1) When you do hard exercise, your body can't supply enough oxygen to your muscles
- 2) Anaerobic respiration is respiration without oxygen
- 3) It's incomplete breakdown of glucose ( the glucose isn't broken down properly )
- 4) Anaerobic respiration is NOT the best way to convert glucose into energy
- 5) This is because it makes lactic acid. The lactic acid builds up in the muscles and gets painful
- 6) Lactic acid also causes muscle fatigue- the muscles get tired and stop contracting as well
- 7) Blood flowing though your muscles removes the lactic acid
- Exercise increases the heart rate
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