Last updated on Jun 09, 2026

Breathing Disorder (Leaving Cert Biology): Revision Notes

📚 Revision Notes

Breathing Disorder info Note Asthma is a breathing disorder caused by the narrowing of the bronchioles, which restricts air from reaching the alveoli. Breathing Disorder Asthma Symptoms • Noisy, wheezing breathing • Breathlessness Causes • Triggered by inhaling allergens such as pollen or dust . • The bronchioles narrow, and their linings become inflamed, reducing airflow to and from the lungs. Prevention If the allergen is identified, asthma can be prevented by avoiding exposure to that specific allergen. Treatment • Steroids are used to reduce inflammation and widen the bronchioles . • These are typically administered through inhalers .

Breathing Disorder	Asthma
Symptoms	• Noisy, wheezing breathing • Breathlessness
Causes	• Triggered by inhaling allergens such as pollen or dust. • The bronchioles narrow, and their linings become inflamed, reducing airflow to and from the lungs.
Prevention	If the allergen is identified, asthma can be prevented by avoiding exposure to that specific allergen.
Treatment	• Steroids are used to reduce inflammation and widen the bronchioles. • These are typically administered through inhalers.

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