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Definition: Bronchoconstriction

Definition: Bronchoconstriction



The airways are lined with a type of muscle called smooth muscle. In people with asthma, these muscles often tighten in reaction to things like allergies, cold weather, or smoke. When this happens, the airways become narrower, blocking the flow of air and making it harder to breathe. This narrowing of the airways is known as bronchoconstriction.

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