a) What is chronic bronchitis?

Chronic bronchitis is prolonged inflammation of the bronchi, characterized by attacks of coughing and expectoration of mucus. By far, the most common cause of chronic bronchitis is smoking. (see slides r, 23)

b) How does smoking cause chronic bronchitis?

1) toxic chemicals in tobacco smoke cause chronic inflammation in the large airways which are called the bronchial tubes; 2) this leads to a marked increase in the size and number of mucus glands in the bronchial wall and 3) the large number of mucus glands secrete a large amount of mucus into the airway which must be coughed up to prevent drowning in your own secretions.

c) How do you know if someone has chronic bronchitis? Can you find an example in the
Video?

Harold Mulhauser: chronic bronchitis (see Video Script pgs 46-47).

12. Surgeon General's Warning: Smoking causes Coronary Heart Disease

a) What is coronary heart disease?

Coronary heart disease is a condition such as atherosclerosis or hardening of the arteries, that reduces the blood flow through the coronary arteries to the heart muscle. This greatly increases the risk of heart pain (angina pectoris) and heart attack (myocardial infarction). A heart attack is that occurring during the period when circulation to a region of the heart is completely obstructed and death of heart muscle is occurring. It is estimated that smoking is responsible for 1/3 of cases of coronary heart disease. (see slide s)

b) How does smoking cause coronary heart disease and heart attacks?

1) Toxic chemicals in tobacco smoke damage the lining of arteries so that less blood gets to the heart, 2) Smoking adds carbon monoxide to the blood which reduces the oxygen supply to the heart, 3) Smoking makes the heart work harder by making it beat faster and against a higher blood pressure. When a heart is forced to work harder while receiving less blood and less oxygen because of smoking, it becomes damaged and produces chest pain.

c) How do you know if someone has coronary heart disease? Can you find an example in the Video?

Jerome Brown: coronary artery disease and heart attack (see Video Script pgs 47-48).