Life Processes of Humans: Avoid Bad Habits

Bad habits such as smoking, taking drugs and drinking alcohol can harm life processes of human.

Chemicals In Cigarettes:

The chemicals in cigarettes and tobacco smoke make smoking harmful. Tobacco smoke contains over 4,000 different chemicals, at least 50 are known to be carcinogens (cause cancer in humans) and many are poisonous. The chemicals such as tar, benzene, nicotine, ammonia, carbon monoxide and others.

 

The Three Main Categories of Drugs

Some drugs due to certain factors that change their characteristics, may cause them to fall under different categories at different times. For example, even though Cannabis is considered a depressant, in high enough doses it can also be a hallucinogen.
The three main categories were constructed based on similarities that certain drugs share; however, there are many differences that these drugs have also.
Stimulants
Stimulants are drugs that stimulate the brain and central nervous system, speeding up communication between the two. They usually increase alertness and physical activity. They include amphetamines, cocaine, crack and some inhalants like amyl or butyl nitrites. Your everyday coffee is a stimulant that many people have formed an addiction to. Those who stop drinking coffee even suffer withdrawal symptoms. 
Depressants
Depressants slow down the activity of the brain and nervous system, slowing down the communication between the two. For medical purposes they can calm nerves, relax muscles and useful for sleeping disorders such as insomnia. 
Hallucinogens
Hallucinogens interfere with the brain and central nervous system in a way that results in radical distortions of a user’s perception of reality. Profound images, sounds and sensations will be experienced, but they will not actually exist. These are vivid hallucinations. 

List of drugs

Stimulants

• Ecstasy
• Speed
• Base
• Ice
• Methamphetamine
• Amphetamine
• Dexamphetamine
• Phentermine
• Methylamphetamine
• Crystal Methylamphetamine
• Paramethoxyamphetamine
• Cocaine
• Crack Cocaine

Depressants

• Cannabis
• GHB
• Inhalants
• Heroin
• Morphine
• Codeine
• Methadone
• Buprenorphine
• Pethidine
• Dilaudid
• Kapanol
• MS Contin

Hallucinogens

• LSD
• Magic Mushrooms (Psilocybin)
• PCP (Phencyclidine)
• Ketamine
• Mescaline   

Effect of drinking alcohols