Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What change to the amount of different gases needed and expelled when exercising?
   • When humans exercise, more oxygen is required for respiration and more carbon dioxide needs to be expelled.
2. What changes with the heart when oxygen is needed more quickly?
   • When humans exercise heart (pulse) rate increases to supply more blood to the lungs.
3. What changes with the breathing when oxygen is needed more quickly?
   • When humans exercise we breath faster and deeper to supply more air to the lungs.
4. What does asthma do to the breathing tubes?
   • Asthma is caused by inflammation (swelling) of the breathing tubes that carry air in and out of the lungs.
5. How does asthma affect breathing?
   • This inflammation makes the breathing tubes narrower and so restricts speed at which air can enter the lungs.
6. Name the three main chemicals in tobacco smoke that can reduce the oxygen pumped around the body?
   • Tobacco smoke contains: - Tar - Nicotine - Carbon monoxide
7. What does tar do to the lungs?
   • The tar lines the surface of the lungs.
8. How does tar affect how well the body can get oxygen?
   • The tar adds a barrier which slows down diffusion.
9. How is the reactivity of carbon monoxide compared to oxygen?
   • Carbon monoxide is more reactive than oxygen.
10. How does carbon monoxide affect how well the body can get oxygen?
    • Carbon monoxide takes the place of oxygen on the red blood Cells, leaving less oxygen to be transported to the Cells.
11. How does nicotine affect how well the body can get oxygen?
    • Nicotine is addictive - it causes a smoker to want more cigarettes. Nicotine also increases the heart rate and blood pressure, and makes blood vessels narrower than normal. This can lead to heart disease.