The pre-synaptic neuron membrane and the post-synaptic neuron form the synapse

Synaptic cleft is a synapse that can be separated or not separated by a gap

The pre-synaptic neuron and the post-synaptic neuron at the chemical synapse are separated by a synaptic cleft.

The calcium ions present in the synaptic space enter the synaptic sides in the axon terminal of the pre-synaptic neuron when the pressure reaches the axon terminal

Synaptic knobs contain synaptic vesicles of pre-synaptic neuron that progresses to the plasma membrane to connect.

At the synaptic junction, the vesicles secrete the neurotransmitter acetylcholine

Acetylcholine molecules tend to bind to protein receptors found in the plasma membrane of post-synaptic neurons

Binding opens the channels of sodium ions into the post-synaptic neuron. At the same time, potassium ions are released from the post-synaptic membrane

This triggers the action force in the post-synaptic neuron membrane. Thus, the impulse is transmitted to the post-synaptic neuron.