PS268 Chapter Notes - Chapter 10: Hydrogen Cyanide, Fetus, Birth Weight
Smokeless Tobacco:
-sales of chewing tobacco began to increase in 70s
-most common types of oral smokeless tobacco are loose-leaf which is sold in a pouch and
moist snuff which is sold in a can
-when you see someone baseball player with big wad in his cheek its probably loose leaf
tobacco
-nicotine is absorbed through mucous membranes of mouth into bloodstream
-blood nicotine levels are comparable to those of smokers
-not as bad as smoking it but increases risk of cancer of mouth, pharynx, and esophagus
-snuff and chewing tobacco also contain potent carcinogens including high levels of
tobacco specific nitrosamines
-leuokoplakia: white, thickening and hardening of mouth tissue, considered a precancerous
lesion (tissue change that can develop into cancer)
-enamel of teeth can be worn down
-8% have used chewing tobacco, less than 1% have recently used it
Are Cigars Back?
-after years of decline, cigar smoking became popular again in mid 90s bc of yuppies,
businesspeople, and celebrities
-many are made in Florida from tobacco supposedly grown from Cuban seeds
-cigarillos and flavoured cigarettes have also become popular with Canadian youth
Document Summary
Sales of chewing tobacco began to increase in 70s. Most common types of oral smokeless tobacco are loose-leaf which is sold in a pouch and moist snuff which is sold in a can. When you see someone baseball player with big wad in his cheek its probably loose leaf tobacco. Nicotine is absorbed through mucous membranes of mouth into bloodstream. Blood nicotine levels are comparable to those of smokers. Not as bad as smoking it but increases risk of cancer of mouth, pharynx, and esophagus. Snuff and chewing tobacco also contain potent carcinogens including high levels of tobacco specific nitrosamines. Leuokoplakia: white, thickening and hardening of mouth tissue, considered a precancerous lesion (tissue change that can develop into cancer) 8% have used chewing tobacco, less than 1% have recently used it. After years of decline, cigar smoking became popular again in mid 90s bc of yuppies, businesspeople, and celebrities.
