A) myelinated nerve fibres
B) non- myelinated nerve fibres
C) liver cells
D) All of the above
Correct Answer: A
Solution :
The myelin sheath of myelinated nerve fibres prevents flow of ions between extracellular fluid and axoplasm. Exchange of ions can occur only at the nodes of Ranvier. Therefore action potential jumps from node to node. This is called saltatory conduction. It is a rapid process and myelinated axons conduct upto so many times faster than the fastest myelinated fibres.
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