What name is given to the unmyelinated gaps that separate the myelin sheaths along an axon?
ASynaptic clefts
BNodes of Ranvier
CDendritic spines
DAxon hillocks
Answer & Solution
Correct answer: B. Nodes of Ranvier
1. Myelin does not coat an axon continuously, but in sheaths with bare gaps between them.
2. Those gaps are called nodes of Ranvier.
3. The voltage pulse triggers a full action potential at each gap, regenerating the signal.
4. Synapses are the junctions between one neuron and the next, not the gaps within a single axon.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Nerve Conduction_
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