NEET Class neet Answered

The conduction speed of figure b would be more as compared to figure a.

Most nerve fibres are surrounded by an insulating, fatty sheath called myelin, which acts to speed up impulses. The myelin sheath contains periodic breaks called nodes of Ranvier. By jumping from node to node, the impulse can travel much more quickly than if it had to travel along the entire length of the nerve fibre. Myelin decreases capacitance and increases electrical resistance across the axolemma. Thus,myelination helps prevent the electric current from leaving the axon and thereby increases the speed of conductin of nerve impulses.