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B
Nodes of Ranvier
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C
Schwann cells
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D
Synapic knob
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E
Neural plate
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Solution
The correct option is A Nodes of Ranvier The length of the myelin sheath along the axon is approximately 1 mm in the PNS. Between two adjacent myelin segments, there are approximately 1-μm-long gaps called nodes of Ranvier that help in transfer of impulse in a saltatory manner.