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how is a signal from a presynaptic neuron transmitted to a postsynaptic cell?
just a quick few sentence answer would be great.
2 Answers
- 1 decade agoFavorite Answer
Neurons "communicate" from a series of neurotransmitters. These are chemicals that leave the presynaptic neuron and travel to the postsynaptic neuron where channels wait for the binding of these transmitters will occurs.
Source(s): AP Biology and AP pyscholgy - 1 decade ago
When the action potential (depolarization) reached the synaptic bulb of the pre-synaptic neuron, calcium ions enter the neuron through gated channels and this causes the release of a neurotransmitter such as acetylcholine into the synaptic cleft. The calcium is pumped out of the neuron. The acetylcholine diffuses across the gap and binds to receptors on the post-synaptic neuron and causes sodium gated channels to open generating a nerve impulse by depolarizing the neuron. The acetylcholine is broken down by an enzyme so that depolarization ceases and the products diffuse back to the pre-synaptic neuron for reuse.
