How mucus affects gas exchange

Question 1

How does mucus affect gas exchange?

Answer 1

1. The layers of mucus within the bronchioles blocks the narrow airways.- prevents movement of air into the alveoli
2. It reduces the umber of alveoli providing surface area for as exchange.

Question 2

How does mucus cause lung over-inflation?

Answer 2

1. Blockages caused by mucus usually allow air to pass during inhalation but not during exhalation.
2. This causes the lung tissue to over-inflate
3. The over-inflation damages the elasticity of the lungs`

Question 3

Why are the layers of mucus a problem?

Answer 3

1. The exchange system is unable to deliver enough oxygen to the cells within the body so aerobic respiration is harder to complete.