How does the presynaptic neuron transmit an impulse (action potential) across the synaptic cleft to the postsynaptic neuron?

How does the presynaptic neuron transmit an impulse (action potential)

1.	How does the presynaptic neuron transmit an impulse (action potential) across the synaptic cleft to the postsynaptic neuron?
Answer» How does the presynaptic neuron transmit an impulse (action potential) across the synaptic cleft to the postsynaptic neuron?