Question

Which of the following options is not correct about the structure marked as ‘a’ in the given figure below.

• A. It is formed by Schwann cells.
• B. It slows the conduction of electrical impulses.
• C. It is made up of protein and fatty substances
• D. It is an insulating layer

Answer 1

The correct option is B It slows the conduction of electrical impulses.

The various parts of the neuron are soma, dendrites, axon and synaptic knob. The axon is surrounded by myelin sheath.
Myelin sheath is an insulating layer that is formed by Schwann cells. It is made up of protein and fatty substances. The myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.