Question

state two functions of myelin sheath​

Answer 1

Explanation:

The myelin sheath has a number of function in the nervous system. The main functions include protecting the nerves from other electrical impulses, and speeding the time it takes for a nerve to traverse an axon.

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Answer 2

Explanation:

The main functions of the myelin sheath are:

1. It acts as an electrical insulator for the neurone - it prevents electrical impulses travelling through the sheath.
2. The sheath prevents the movement of ions into or out of the neurone/ it prevents depolarisation.
3. It speeds up conduction/ transmission of an electrical impulse in the neurone - impulses cannot travel through the sheath (the sheath acts as an electrical insulator), instead, impulses 'jump' from a gap in the myelin sheath to another gap (it jumps from one Node of Ranvier to another Node). This is a process called Saltatory Conduction.

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