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

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En esta lección vamos a discutir el papel de los neurotransmisores en la transmisión de señales en el sistema nervioso.

Terms to Know

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

Exciting Signals

Signals that trigger an action potential to happen.

Inhibiting Signals

Neurotransmitters that inhibit or prevent action potentials.


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

Postsynaptic Cell

The cell at a synapse to which the neurotransmitter binds.

Presynaptic Cell

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


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