Zoology - Breathing and Exchange of Gases Question with Solution | TestHub

Asthma is a respiratory disorder with inflammation of bronchi and bronchioles. This results in spasmodic contractions. The main cause of asthma is allergic reactions or hypersensitivity. Airway narrowing is also seen due to which there is difficulty in breathing and this produces wheezing sound. This can be heard through stethoscope and is the characteristic feature of this condition.