Health Sciences 1001A/B Lecture Notes - Lecture 16: Coronary Artery Disease, Passive Smoking, Psychoactive Drug
Chapter 16 - toward a tobacco-free self and society. Smoking is the most preventable cause of disease and premature death in. Every cigarette a person smokes reduces life expectancy by approximately. More than 37,000 people die prematurely each year in canada due to tobacco use. Nicotine addiction: an addiction involving physical dependence on the psychoactive drug nicotine. Nicotine: a poisonous, addictive substance found in tobacco and responsible for many of the effects of tobacco. Addicted users must keep a steady amount of nicotine in the blood and going to the brain. If that amount decreases, they experience withdrawal symptoms. Nicotine addiction can start within a few days of smoking and after just a few cigarettes. Negative effects on nearly every organ of body and decreases overall health. Related to more than two dozen diseases and conditions. Contain over 4000 chemicals, 40-50 of which are carcinogens or co-carcinogens and/or irritate the tissues of the respiratory system.