Q9. Differentiate between:
(a) Myelinated and non-myelinated axons
Myelinated Axons |
Non-myelinated Axons |
1. Myelin sheath is present. | 1. Myelin sheath is absent. |
2. Nodes of Ranvier are present. | 2. Nodes of Ranvier are absent. |
It is found in the grey matter of the brain, spinal cord, and autonomous nervous system. | 3. It is found in the white matter of the brain, spinal cord and autonomous nervous system. |
4. The conduction of nerve impulse is node to node. | 4. The conduction of nerve impulse is smooth. |
5. The speed of conduction of impulse is 50 times faster than in non-myelinated axon. | 5. The speed of conduction of impulse is slow. |