p460

Social smoking has negative short- and long-term health effects and can lead to dependence. p462

Some cigarette labels warn of the dangers of smoking; others emphasize the benefits of quitting. p463

Figure 14.1 The Immediate Effects of Nicotine on the Body The primary active ingredient in tobacco is nicotine, a fast-acting and potent drug. Figure 14-1 p469

Figure 14.2 Some Effects of Smoking on the Body Smoking harms the respiratory system and the cardiorespiratory system. The leading cause of death for smokers is heart attack. Figure 14-2 p470

Healthy nonsmoker’s lung (left) and smoker’s lung (right). Healthy lungs are pink, with a smooth but porous texture. A smoker’s lungs show obvious signs of impairment. Bronchial tubes are inflamed, air passages are constricted, and tar coats the bronchial tubes. p472

Many students assume that water-pipe smoking is safer than cigarette smoking, but the risks are similar. p473

Table 14-1 p473

Nicotine gum, when chewed, gradually releases a nicotine resin and helps some smokers quit. p477

A nicotine patch releases nicotine through the skin in measured amounts, which are gradually decreased over time. p478

Table 14-2 p478

Secondhand smoke is the most common and hazardous form of indoor air pollution. p480

Figure 14.3 Nonsmoker’s Bill of Rights Figure 14-3 p481