<unk>  ( ), also known as myelin-sheath gaps, occur along a myelinated axon where the axolemma is exposed to the extracellular space.<unk>  are uninsulated and highly enriched in ion channels, allowing them to participate in the exchange of ions required to regenerate the action potential. Nerve conduction in myelinated axons is referred to as saltatory conduction () due to the manner in which the action potential seems to "jump" from one<unk>  to the next along the axon. This results in faster conduction of the action potential.
Node of Ranvier
Sarcoplasmic reticulum
Projection fiber
External limiting membrane
Neuroeffector junction
Internal limiting membrane
Neuromere
Basal dendrite