Q. Asthma may be attributed to :

 4367  273 NEETNEET 2016Breathing and Exchange of Gases Report Error

Solution:

Asthma is an allergic condition in which the tissue surrounding the bronchioles of the lungs swell up and compress the bronchioles thus causing difficulty in breathing. This allergy mainly involves IgE antibodies and chemicals like histamine and serotonin from the mast cells.