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Cranial Nerves

Nerve impulse...

Question

Nerve impulse travels faster in

A

Myelinated nerve

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B

Non - myelinated nerve

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C

Cranial nerve

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D

Spinal nerve

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Solution

The correct option is A Myelinated nerve
Saltatory conduction is the propagation of action potentials along myelinated axons from one node of Ranvier to the next node, increasing the conduction velocity of action potentials.

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Q. Give the difference between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre.

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Q. Consider the following statements and find out coorect option:
(a) Three are two types of axons, namely myelinated and non myelinated
(b) Myelinated nerve fibres found in autonomous and the somatic neural systems
(c) The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
(d) The gap between two adjacent myelin sheaths are calleds nodes of Ranvier.
(e) Unmyelinated nerve fibre found in spinal and cranial nerves
(f) Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon.

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