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Understanding how habits work, especially with smoking, requires looking at the brain's reward system and how it forms automatic behaviors. At the heart of this process is dopamine, a neurotransmitter responsible for Smoking And Your Brain: The Negative Effects You Should Know Smokefree Cigarettes are good for you : r doughboys What Happens When You Smoke? Cigarettes contain nicotine, tar, and carbon monoxide. Short term effects: Increased heart rate Higher blood pressure Reduced oxygen Long term effects: Lung cancer Smoking harms brain health, regardless of other health conditions American Heart Association The Story Science Education Enhances Knowledge (SEEK)
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