Formative Practice 8.4 (Form 4 Biology Textbook Exercise and Answer)


Question 1:
What are the effects of chronic bronchitis on the bronchiole?

Answer:
Bronchioles become inflamed, swollen and clogged.


Question 2:
Explain the condition of bronchiole walls in asthmatic patients.

Answer:
The bronchiole walls swell and thicken. The opening of bronchiole tube becomes smaller and the airway becomes narrower.

Question 3:
How does the usage of an inhaler help an asthmatic patient to breathe?

Answer:
Inhaler reduces inflammation and opens up the bronchiole tubes so that air can flow easily.


Question 4:
Explain why the gaseous exchange becomes less efficient for an emphysema patient.

Answer:
The alveoli walls become damaged. The surface area of the alveoli is reduced and gaseous exchange becomes less efficient.

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