What happens at the synapse between two neurons?

Explanation

The synapse is a microscopic gap between any two adjacent neurons. Electrical impulses (or nerve impulese) carrying messages pass over the synapse when going one neuron to another. Actually, synapse between two neurons acts as a one-way valve which allows electrical impulses to pass in one direction only. This happens acts as follows : When an electrical impulse coming from the receptor reaches the end of the axon of sensory neuron, then the electrical impulse coming from the receptor reaches the end of the axon of sensory neuron, then the electrical impulse releases tiny amount of a chemical substance (called neurotransmitter substance) into the synapse (or gap) between two adjacent neurons. This chemical substance crosses the synapse (or gap) and starts a similar electrical impulse in the dendrite of the next neuron. In this way, the electrical impulses (or messages) are from one neuron to the next across the synapse.