differentiate myelinated and non myelinated nerve fibre
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Answer:
The Difference
Myelinated Nerve Fibers are nerve fibers that are insulated by a myelin sheath whereas Unmyelinated Nerve fibers are nerve fibers that do not have a myelin sheath. Myelin is a fatty substance that insulates the nerve cell axons so as to increase the speed at which information travels from one nerve cell body to another for example from a nerve cell body to a muscle.
The myelinated nerve fibers are white in color whereas the unmyelinated nerve fibers are gray in color.
The myelinated nerve fibers have nodes of Ranvier while unmyelinated nerve fibers do not have nodes of Ranvier. Nodes of Ranvier are the spaces between the myelin coatings on the neuron’s axon. The nodes of Ranvier serve to facilitate the rapid conduction of nerve impulses.
Due to presence of nodes of Ranvier on myelinated nerve fibers, the speed of transmission of nerve impulses is high in myelinated nerve fibers. On the contrary, unmyelinated nerve fibers do not have myelin insulations, and therefore, the speed of the transmission of the nerve impulses is low.
Most neurons in the central and peripheral nervous system are myelinated because they require fast conduction speed such as neuron involved in spinal reflexes. Unmyelinated neurons can be found in both the peripheral and central nervous system in the group c nerve fibers, responsible for transmission of secondary pain or itch.
Due to presence of myelin sheath, myelinated nerves do not lose the impulse during conduction whereas unmyelinated nerve fibers can lose the nerve impulse during conduction.
The nerve fibers with long axons are myelinated whereas the short axon nerve fibers are unmyelinated.
The Difference Between Myelinated And Unmyelinated Neurons (Nerve Fiber) In Tabular Form
BASIS OF COMPARISON MYELINATED NERVE FIBER UNMYELINATED NERVE FIBER
Description Myelinated Nerve Fibers are nerve fibers that are insulated by a myelin sheath. Unmyelinated Nerve fibers are nerve fibers that do not have a myelin sheath.
Color The myelinated nerve fibers are white in color. The unmyelinated nerve fibers are gray in color.
Nodes of Ranvier The myelinated nerve fibers have nodes of Ranvier. Unmyelinated nerve fibers do not have nodes of Ranvier.
Speed of Transmission Due to presence of nodes of Ranvier on myelinated nerve fibers, the speed of transmission of nerve impulses is high in myelinated nerve fibers. Unmyelinated nerve fibers do not have myelin insulations, and therefore, the speed of the transmission of the nerve impulses is low.
Location Most neurons in the central and peripheral nervous system are myelinated because they require fast conduction speed such as neuron involved in spinal reflexes. Unmyelinated neurons can be found in both the peripheral and central nervous system in the group c nerve fibers, responsible for transmission of secondary pain or itch.
Impulse Conduction Due to presence of myelin sheath, myelinated nerves do not lose the impulse during conduction Unmyelinated nerve fibers can lose the nerve impulse during conduction.
Axons The nerve fibers with long axons are myelinated. The short axon nerve fibers are unmyelinated.
What is the main difference between Myelinated and Unmyelinated Nerve fiber?
Myelinated Nerve Fibers are nerve fibers that are insulated by a myelin sheath whereas Unmyelinated Nerve fibers are nerve fibers that do not have a myelin sheath. Myelin is a fatty substance that insulates the nerve cell axons so as to increase the speed at which information travels from one nerve cell body to another for example from a nerve cell body to a muscle.
Answer:
▶Due to presence of myelin sheath, myelinated nerves do not lose the impulse during conduction whereas unmyelinated nerve fibers can lose the nerve fibers with long axons are myelinated whereas the short axon nerve fibers are unmyelinated. ✔
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