Role of Mucus in the Lungs

Question 1

Describe the normal features of mucus within the lungs.

Answer 1

Usually, the airways within the lungs are coated in a thin layer of mucus.

Question 2

What is the function of mucus within the airways?

Answer 2

• It traps dust, debris and micro-organisms and ensures they do not enter the body.
• The mucus is either coughed out or swallowed (where the stomach kills the bacteria) and reduces the risk of infection.

Question 3

What is the function of the goblet cells?

Answer 3

To produce and secrete mucus.

Question 4

What are the features of a CF patient’s mucus?

Answer 4

1. It is thick and sticky because it contains less water
2. The cilia cannot move it as easily
3. The mucus increases the chances of lung infections and makes gas exchange less efficient.