What is the name of the fluid-filled space between the pre- and...

At electrical synapses, the membranes of pre- and post-synaptic neurons are in close proximity, allowing electrical current to flow directly from one neuron into the other across these synapses. Transmission of an impulse across electrical synapses is similar to impulse conduction along a single axon.The membranes of pre- and post-synaptic neurons at a chemical synapse are separated by a fluid-filled space called the synaptic cleft. When an impulse arrives at the axon terminal, it stimulates the movement of the synaptic vesicles towards the membrane where they fuse with the plasma membrane and release their neurotransmitters in the synaptic cleft. The released neurotransmitters bind to their specific receptors on the post-synaptic membrane, opening ion channels and allowing the entry of ions to generate a new potential in the post-synaptic neuron.