Question

Emphysema is another disease of the lungs. People with emphysema may feel weak and tired. Explain why. ( 5 marks)

Accepted Answer

1 Alveoli break down/collapse/rupture/walls thicken; 2 Less surface area/increases diffusion distance/less diffusion; 3 Loss of elastin/elastic tissue/elastase involved; 4 (Alveoli/lungs) cannot recoil/spring back/have reduced elasticity/more difficult to expel air; 5 Reduced diffusion gradient/air not replenished/less air leaves lungs;

Front	Emphysema is another disease of the lungs. People with emphysema may feel weak and tired. Explain why. ( 5 marks)
Back	1 Alveoli break down/collapse/rupture/walls thicken; 2 Less surface area/increases diffusion distance/less diffusion; 3 Loss of elastin/elastic tissue/elastase involved; 4 (Alveoli/lungs) cannot recoil/spring back/have reduced elasticity/more difficult to expel air; 5 Reduced diffusion gradient/air not replenished/less air leaves lungs;

Emphysema Diffusion Reduced Disease Lungs People Feel Weak