Summary
If you are a smoker, then you have three problems right now. The first is a serious one: Nicotine is a highly addictive drug. Why is nicotine so addictive? It's because nicotine rewires your brain. Once rewired, your brain feels bad without nicotine.
Nicotine mimics a neurotransmitter in your brain called acetylcholine. To your neurons, nicotine looks like a surge of acetylcholine. This surge causes a release of dopamine, which is pleasant and feels good. The surge of dopamine is the reason people enjoy smoking.See the full content of this document
Extract
How Stuff Works: ; Ecigarettes Offer Smoke-Free Puff
Unfortunately, your brain also responds to the surge of fake acetylcholine, repeated day after day, by changing the number of its acetylcholine receptors and the amount of the ne...
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