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Question

The insulating sheath covering the axon called

A
Plasmalemma
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B
Myelin sheath
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C
Dura mater
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D
Pia mater
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Solution

The correct option is A Myelin sheath
Myelin sheath is an insulating layer covering the axons. It is made up of proteins and fatty substances. It helps in mixing of impulses and saltatory conduction of impulse through the axon.
So, the correct answer is 'Myelin sheath'

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