In the human nervous system where are synapses located directly between?
They are between two neurons.
A synapse is a gap between two neurons that neurotransmitters diffuse across to help transfer an electrical impulse.
In simpler terms, chemicals from one neuron travel over to the next and trigger an impulse in the second neuron.
This is how signals are transmitted through the nervous system.
Hope this helps; let me know if I can do anything else:)