PSY 605 Lecture Notes - Lecture 8: Formaldehyde, Benzene, Coronary Artery Disease
30 May 2018
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• Smoking & Weight Management
• Canadian Smoking Statistics
• 18% of Canadians smoke currently
• Of curret sokers, 75% report sokig daily
• Sex differences
• 18% of men
• 14% of women
• 45,000 deaths per year due to smoking
• Trends over time
• Smoking prevalence among those 15+ years of age has continuously declined from
25% in 1999
• The younger Canadians start, the more likely they are to stay heavy smokers.
• Decreases in Smoking Prevalence
• Smoking as a Health Hazard
• The Respiratory System
• Takes in oxygen via inspiration
• Excretes carbon dioxide
• Allows exchange of gases in alveoli - tiny air sacs in the lung for gaseous exchange
• Also allows foreign particles to enter
• Body protects itself through various mechanisms
• Smoke increases mucus secretion but decreases activity of cilia
• Nasal hairs, mucus and cilia. The respiratory system (or gaseous exchange tract) is
protected in several ways. ... Sticky mucus traps dust and microbes. These are then carried
away by cilia, which are tiny hairs on the cells that line the gaseous exchange tract.
• So dirt will get trapped but it won't be carried away - mucus will stay in your airways as the
cilia won't clean the lungs and so the mucus will clog your throat, making you cough
• Smoking one cigarette can slow the action of your cilia for several hours. Smoking
also reduces the number of cilia, so there are fewer cilia to clean your lungs. Your lungs
and airways have more mucus, and the mucus is not cleaned out well. So
the mucus stays in your airways, clogs them, and makes you cough.
• Nicotine
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