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  • Synapses
    • How They Work
      • 1. An Electrical Impulse travels along an AXON
      • 2. This triggers a nerve ending of a neuron to release chemical messengers called NEURO TRANSMITTERS
      • 3. The chemicals diffuse across the Synapse
      • 4. They then bind with receptor molecules on the membrane of the next neuron
      • 5.The receptor molecules on the second neuron bind only to the specific chemicals released from the first neuron.
      • 6. This stimulates the second neuron to transmit the electrical impulse
    • Drugs
      • Some drugs stop the impulse from passing across the Synapse
      • Prozac: Anti-depressant that causes Serotonin to build up in Synapses, blocks the re-uptake of Serotonin in the Synapses
      • Beta Blockers: blocking the receptor sites on heart muscle cells so impulses from nerves which would speed up the heart are prevented from passing to the heart.
      • Serotonin is a chemical released by the Brain which stimulates pleasure
      • Ectasy: Blocks the Serotonin receptors in the brain, prevents it from being absorbed by receptor molecules - serotonin increase, the individual becomes happier


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