Question

If myelin sheath is continuous in myelinated nerve fibre than what will happen in neuronal conduction?

1) Velocity is increased
2) Conduction is slow
3) Conduction is stopped
4) None of these

Also state the reason for ur answer chosen.

Answer 1

If myelin sheath is continuous in myelinated nerve fiber the velocity increased in neuronal conduction, then conduction becomes slow.

• This myelin sheath is present on the neurons it is produced by the oligodendrocytes in the Central Nervous system.

• The nerve impulses are jump from node to node, this will increase the transmission speed of nerve impulses.

• When the velocity increases it will affect the neuronal conduction then conduction becomes slow.

Answer 2

If myelin sheath is continuous in myelinated nerve fibre then conduction is stopped.

Option 3

Explanation:

• Myelin sheath is a discontinuous layer of fat that is present on the axon of a neuron.

• The Myelin sheath isn’t continuous throughout the axon, and the gaps called the Nodes of Ranvier are there where the axolemma directly touches the neurilemma.

• These nodes of Ranvier are very important for the myelinated neurons as they are the place where the electric conduction takes place in the axon and the ion exchange in response to the stimulus takes place.

• This process is called salutatory conduction of nerve fibres which is way more faster than normal conduction.

• But if they are not present, then the neuron won’t be able to transmit the impulse and eventually conduction is stopped.  

Learn more about myelin sheath

Define axon and define myelin sheath ​

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What happens if myelin sheath is absent​

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