Highly addictive chemical compound found in cigarrettes.

Inflammation of the hollow muscular organ that forms an

air passage to the lungs and holds the vocal cords.

Antibiotics are not an effective treatment for viral infections because viruses:

Disease that is characterized by production of abnormally thick mucus, leading to the blockage of the pancreatic ducts, intestines, and bronchi.

Bronchodilators are effective to treat some diseases of the respiratory system because they:

Associated with lower survival rates in lung cancer.

Chronic inflammation of the lining of bronchial tubes, which carry air to and from the lungs.

Corticosteroids are effective medications to treat some respiratory diseases because they:

Characterized by uncontrolled growth of abnormal cells in one or both lungs.

Characterized by narrowed and swollen airways that produce extra mucus.

Lung Cancer is more common in

Signs and symptoms of asthma can be triggered by all of the following, EXCEPT:

Smoking can cause the following, EXCEPT: