In a medullated nerve fibre, the conduction of Impulse is faster due to the presence of _______________.

pericytes

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endoneurium and epineurium

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myelin sheath and nodes of Ranvier

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Nissil's granules.

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Solution

The correct option is C myelin sheath and nodes of Ranvier
Medullated nerve fibres are covered by myelin sheath. The conduction of impulse is faster in medullated nerve fibre due to the presence of myelin sheath and nodes of Ranvier.

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Explain the following processes :

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(b) Depolarization of the membrane of a nerve fibre

(d) Transmission of a nerve impulse across a chemical synapse

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