A bronchospasm is a contraction of the smooth muscle in the walls of the bronchi and bronchioles that tighten and squeeze the airway shut.

Name: A bronchospasm is a contraction of the smooth muscle in the walls of the bronchi and bronchioles that tighten and squeeze the airway shut.
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A bronchospasm is a real phenomenon where the smooth muscle in the walls of the bronchi and bronchioles contract and narrow the airway. This can lead to difficulty breathing and even wheezing.

A Bronchospasm Is a Contraction of the Smooth Muscle in the Walls