tobacco effects, tobacco psychological and physical effects.

Tobacco: psychological effects.

Tobacco's nicotine affect the brain's dopamine levels, the molecule of pleasure and mimics other neurotransmitters(acetylcholine) affecting mood, appetite,and memory. (Read Tobacco brain effects section)

Once the brain is accustomed to a certain level of nicotine, it will claim more as the levels drop.(Read Tobacco addiction section)

Tobacco: physical effects.

Nicotine affects the entire body. Nicotine acts directly on the heart to change heart rate and blood pressure. It also acts on the nerves that control respiration to change breathing patterns. In high concentrations, nicotine is deadly, in fact one drop of purified nicotine on the tongue will kill a person. It's so lethal that it has been used as a pesticide for centuries.

As tobacco reduces the amount of oxygen to the brain and muscles, it is responsable for headaches, "vertiges", and diminishes exercise endurance.

The long term phisical effects of tobacco are devasting leading to certain death caused by:

• Coronary linked problems
• Lungs linked problems

These physical problems are detailed in the risks section