Health Sciences 1001A/B Lecture Notes - Lecture 14: Coronary Artery Disease, Pulmonary Heart Disease, Aortic Aneurysm
Smoking is the most preventable cause of disease and premature death in canada. Every cigarette a person smokes reduces life expectancy by ~ 11 minutes. More than 37,000 people die prematurely each year in canada due to tobacco use. Tobacco use accounts for nearly 1 in 5 deaths in canada. An addiction involving physicaldependence on the psychoactive drug nicotine. Nicotine a poisonous, addictive substance found in tobacco and responsible for many of the effects of tobacco. Low doses acts as a stimulant (increases heart rate and blood pressure) Adults enhance alertness, concentration, rapid information processing, memory, and learning. Relieves withdrawal symptoms (anxiety, irritability, and mild depression) in tobacco users trying to quit. 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.