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Drugs

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English presentation about drugs in common and special drugs

Drugs in common:

What are drugs ? A drug is any chemical you take that affects the way your body works. Alcohol, caffeine, aspirin and nicotine are all drugs. A drug must be able to pass from your body into your brain. Once inside your brain, drugs can change the messages your brain cells are sending to each other, and to the rest of your body. They do this by interfering with your brain's own chemical signals: neurotransmitters that transfer signals across synapses. Drugs lead primarily to a intoxication or emergence of a dependency syndrome. They change the awareness and the perception of the consumer during their impact and beyond.
They affect three primal parts of the brain: • The brain stem which is in charge of all of the functions our body needs to stay alive
• The limbic system links together a bunch of brain structures that control our emotional responses.
• The cerebral cortex is the mushroom-like outer part of the brain. In humans, it is so big that it makes up about three-fourths of the entire brain. It’s divided into four areas, called lobes, which control specific functions. Some areas process information from our senses, enabling us to see, feel, hear, and taste. The front part of the cortex, known as the frontal cortex or forebrain, is the thinking center. It powers our ability to think, plan, solve problems, and make decisions.

How do they proceed in our brain ?
Drugs are chemicals. They work in the brain by tapping into its communication system and interfering with the way nerve cells normally send, receive, and process information. Some drugs can change the brain in ways that last long after the person has stopped taking drugs, maybe even permanently. This is more likely when a drug is taken repeatedly.
Some drugs, such as marijuana and heroin,...

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