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B1 Topic 3
Jaimini Ladwa…read more

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Drugs are chemical
substances that affect the
central nervous system,
causing psychological
changes and possible
addiction.…read more

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Painkillers deaden pain or affect
the way we think about it.
They block the receptor sites on
the postsynaptic membrane, as
painkillers have a complementary
shape, therefore, no impulses can
pass. This means that no sensation
can be felt.
Paracetamol: a weak/mild
Morphine: a prescription-only
painkiller that is very
strong. It is produced from
opium (found in poppy plants)
and its narcotic effects cause
drowsiness.…read more

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Hallucinogens produce
sensations of false
reality (hallucinations)
and cause changes in
psychological behaviour.
They alter the pathway
that electrical impulses
travel down.
Lysergic Acid
Diethylamide (LSD)
Cannabis (Marijuana)
MDMA (Ecstasy)…read more

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Stimulants speed up
reflexes/decrease reaction
They bind to the presynaptic
membrane and allow for the
release of more
neurotransmitters at one time.
Caffeine: non-prescription,
legal drug found in
chocolate, tea, coffee and
cola.…read more

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