What is the purpose of a synaptic cleft?

The action potential is generated in response to a stimulus and travels along the length of the axon, transmitting the nerve impulse. The rise in permeability to Na⁺ is short-lived and is followed by a rise in permeability to K⁺. K⁺ diffuses outside the membrane, restoring the resting potential of the membrane.A synapse is a junction between two neurons that allows the transmission of a nerve impulse from one neuron to another At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity, allowing for the flow of direct electrical current from one neuron into the other. Neurotransmitters are chemicals involved in transmitting impulses at chemical synapses. They bind to 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.