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1. What is nicotine? and why is it dangerous? Nicotine is a stimulant drug that speeds up the messages travelling between the brain and body. It is dangerous becasue It can cause an increase in blood pressure, heart rate, flow of blood to the heart, and a narrowing of the arteries. Nicotine may also contribute to the hardening of the arterial walls, which in turn, may lead to a heart attack.

2. Explain why cigarette smoke is toxic? Cigarette smoke can contain high levels of carbon monoxide. Hydrogen cyanide was used to kill people in the gas chambers

3. The short-term effects of smoking include Bad breath. Fatigue and a decrease in energy. Reduction in the senses of taste and smell.increased risk of stroke and brain damage. The long term effects include eye cataracts, macular degeneration, yellowing of whites of eyes, loss of sense of smell and taste, yellow teeth, tooth decay, and bad breath, cancer of the nose, lip, tongue, and mouth, possible hearing loss, and laryngeal and pharyngeal cancers.

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