This lesson will describe neurons communicate when sending a signal through the nervous system.

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  • Neurotransmitter

    The chemical form of a signal that is sent between neurons and muscle cells, gland cells or other neurons.

  • Synapse

    The gap between a neuron and a gland cell, muscle cell and another neuron.

  • Presynaptic Cell

    The cell at a synapse that stores a neurotransmitter for release.

  • Postsynaptic Cell

    The cell at a synapse to which the neurotransmitter binds.

  • Exciting Signals

    Signals that trigger an action potential to happen.

  • Inhibiting Signals

    Neurotransmitters that inhibit or prevent action potentials.

  • Botox

    A bacterial toxin that is often used to smooth facial wrinkles by stopping the release of the neurotransmitter acetylcholine.