Exercise can trigger an asthma attack.This is especially true if someone goes for a long run on a cold morning.The two main causes of the narrowing of the bronchiole passageways can be treated with drugs that act in different ways.What are the two causes of this narrowing,and how can drugs work to counteract these conditions?

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The Answer of Exercise can trigger an asthma attack.This is especially true if someone goes for a long run on a cold morning.The two main causes of the narrowing of the bronchiole passageways can be treated with drugs that act in different ways.What are the two causes of this narrowing,and how can drugs work to counteract these conditions?

Exercise Can Trigger an Asthma Attack