Learning objectives – to understand how drugs work and how they are
used by people a drug is a chemical substance that
alters the working of the human body, this can come
in the form of medication which alters the body in a
positive way, or a recreational drug which will alter
the body in a negative way.
There are many different types of drugs:
|Type of drug||Effect on body||Example|
|Painkiller||It blocks nervous impulses sent from the brain to stop pain being felt||paracetamol|
|Performance enhancer||Helps you perform better in sport by improving your muscle strength||Anabolic steroids|
|Depressant||Slows down brain activity||alcohol|
|Stimulant||Activates nervous impulses and increases brain activity||Caffeine|
|Hallucinogenic||Alters you brain activity and makes you things that aren’t really there||LSD|
Stimulants and depressants work on the chemical messengers known as the
neurotransmitters, which travel between the neurons in the space called
By altering the neurotransmitters it affects how fast the impulse can travel
around the body.
Stimulants will increase the amount of neurotransmitters present where as
depressants stop neurotransmitters from binding to thenext neurone.