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Effects of Drugs, Smoking, Alcohol

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Drugs, Smoking and Alcohol
• Chemicals that affect the central nervous, changing behaviour and possibly addiction.
- Stimulant (e.g. Caffeine): speeds up reactions
- Depressant (e.g. Alcohol): slows reactions
- Painkillers (e.g. Morphine): blocks nerve impulses
- Halucinogen (e.g. LSD): changes sense perception

• Tobacco smoke contains many chemicals affecting health
- Nicotine: Stimulant, addictive
- Tar: Carcinogen (causes cancer)
- Carbon monoxide: Reduces oxygen levels in blood

• Alcohol
- Short term effects: Blurred vision, lowered inhibitions, slowed reactions
- Long term effects: Liver cirrhosis (could require transplant), brain damage



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