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Examine the picture given below. a) Identify A and B.  b) What is the role of A in the transmission of electric impulses?

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Examine the picture given below.

a) Identify A and B. 

b) What is the role of A in the transmission of electric impulses?

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a) A – Myelin sheath. 

B – Schwann cell. 

b)1. accelerates impulses. 

2. act as an electric insulator. 

3. provides nutrients and oxygen to axon.

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