Nicotine

What is the most dangerous substance in the world

tobacco

How much does smoking lower life expectancy

by 10-11 years

non smokers live to 84

and smokers live to 73

quitting before age 30 adds 10 years to life span

who “discovered” tobacco

Columbus in 1492

How was tobacco used in the 1700s-1800s

-smoking clubs

-smoking infrequent

-harsh taste (acid)

-expensive

what do water pipes do

removes acid

Bonsack machine

reduced production cost, no longer needed to be rolled by hand

Flue-curing

reduced harshness of smoke

How did cigarettes become more common

1. machine manufacturing reduced cost and that make smoking more affordable

2. flue-curing reduced irritants in smoke therefore smoke could be brought deep into lungs

How does nicotine act on acetylcholine receptors

binding to a specific type called nicotinic acetylcholine receptors

makes you feel alert