7.2 Asthma Flashcards
1
Q
Name 4 common asthma triggers.
A
Dust mites
Cigarette smoke
Pollen
Stress
2
Q
What happens during an asthma attack?
A
Cells lining bronchioles release histamines
3
Q
What change do histamines cause during an asthma attack?
A
Histamines:
• Cause epithelial cells to inflame and swell
• Stimulate goblet cells to make excess mucus
• Smooth muscle in bronchiole walls contract
Due to this, airways narrow and fill with mucus, making it difficult to breathe.
4
Q
Relievers are an asthma medicine. What are they? How do they work?
A
Chemicals similar to adrenaline
They attach to active sites on surface membranes of smooth muscle in bronchioles, making them relax and dilating airways
5
Q
What are steroids?
A
Reduce sensitivity of the airway lining
