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  4. Asthma is characterised by

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Q. Asthma is characterised by

Odisha JEEOdisha JEE 2011Breathing and Exchange of Gases

Solution:

Asthma is a respiratory disorder. It is caused by allergic reactions due to pollen etc. It results in spasm of bronchial muscles and thus the patient experiences shortness of breath and thus difficulty in breathing. The characteristic feature that helps is diagnosis is production of wheezing sound