Neurotransmission Fact Sheet

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Heroin and Cocaine <strong>Fact</strong> <strong>Sheet</strong>HEROINChanges in the brain are responsible for heroin. Using heroin activates the brain’sopiateand increases the amount of dopamine released, which results in a short-lived. By acting on the receptors, users can experience feelings ofeuphoria and decreased pain. Users can also experience nausea and cloudy thinking. After repeateduse, receptors decrease and heroin users need more and more of the drug just to feel the same effects,or to avoidsymptoms. Withdrawal symptoms are intense for a heroin addict, andinclude insomnia, muscle and bone pain, vomiting, and cold flashes.Word Bank: opiate, addiction, rush, withdrawal, receptorsCOCAINECocaine prevents the normalof dopamine during neurotransmission.This causes abuild-up of dopamine in the, which gives a cocaine-user strong feelings of pleasure.When a person stops using cocaine, dopamine levels decrease and the person needs more of thedrug to restore thelevel and to feel normal again. Repeated cocaine use can causedamage to neurons and lead to problems withand learning. Cocaine withdrawalcan lead to feelings of, anxiety, and paranoia.Word Bank: dopamine, memory, reabsorption, depression, synapseModule 5
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Neurotransmission Fact Sheet

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