Asthma can be caused by extrinsic and intrinsic factors. Presence of these factors triggers the release of the chemical mediators which does not include:
a. Serotonin
b. Prostaglandin
c. Bradykinin
d. Adrenaline
Answer: D.
Allergy (extrinsic) and inflammation (intrinsic) triggers the release of chemical mediators that causes narrowing of the airways and spasm. These mediators are:
• Serotonin
• Prostaglandin
• Bradykinin
• Histamine
• Leukotrienes.