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Asked Nov 3, 2019
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Distinguish between saltatory nerve signal conduction in myelinated axons versus unmyelinated

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Expert Answer

Step 1

Saltatory conduction is a form of nerve impulse conduction in which the action potentials are jumping from one node to the other.

Myelinated axons are those having myelin sheath around its length and it is white whereas unmyelinated axons do not have myelin and it is grey. Schwann cells are the type of cells that form myelin sheath which greatly influences the conduction speed. These cells are also important for nerve regeneration.

Step 2

In a myelinated axon, the impulses will travel faster as it is insulated with myelin which greatly boosts up the conduction velocity. Whereas in an unmyelinated axon the velocity will be lesser due to the gaps present in the myelin wrapping.  These gaps are not throughout the axons...

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