Synaptic cleft
= Synaptic cleft
The synaptic cleft is the extracellular gap between the sending and receiving <cell membranes> of a <chemical synapse>. Released <neurotransmitter> crosses this gap to reach a <receptor>. <Molecular Biology of the Cell, 4th edition by Bruce Alberts and others/Ion Channels and the Electrical Properties of Membranes>{ref}