Final answer:
Neurotransmitters are the chemical substances that facilitate the transport of nerve impulses among nerve cells.
Step-by-step explanation:
The chemical substance which facilitates the transport of nerve impulses among nerve cells is known as neurotransmitters. Neurotransmitters are a type of chemical messenger that transmits signals from one neuron to another. They can be excitatory, promoting the generation of nerve impulses, or inhibitory, preventing the generation of nerve impulses.
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