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    Neurotransmitters

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    List four things that could happen to a neurotransmitter after its
    release from a presynaptic neuron. (Inhibition and Excitation of the
    postsynaptic neuro are two of them...what are the other two?)

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    re

    I think it is degradation by enzymes or reuptake into presynaptic neuron.

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    petarm is right, just adding to the mechanism.
    neurotransmitters like Ach are esterified by Ach esterase to inhibit the action of Ach on the postsynaptic membrane.
    Where as neurotransmitters like glycine, glutamine(amines) are driven back to the presynaptic membrane, its the only way to end the neurotransmitting action, they is no enzymes involved, the amines are driven bactk by the gradient concentration.

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