Final answer:
Nodes of Ranvier are not exclusive to motor axons of the PNS, but are found in both motor and sensory axons. They contain voltage-gated K+ and Na+ channels which allow action potentials to travel down the axon by jumping from one node to the next.
Step-by-step explanation:
Nodes of Ranvier are gaps in myelin coverage along axons. They are not exclusive to motor axons of the PNS, but are found in both motor and sensory axons. Nodes of Ranvier contain voltage-gated K+ and Na+ channels which allow action potentials to travel down the axon by jumping from one node to the next.