Unmyelinated intervals on axons are called :
Nodes of Ranvier
Many axons are wrapped in a myelin sheath formed by Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system.
The sheath is not continuous: it is interrupted at regular intervals by short unmyelinated gaps called the nodes of Ranvier, named after the French histologist Louis-Antoine Ranvier.
Voltage-gated sodium channels are concentrated at these nodes, so the action potential is regenerated only there and appears to 'jump' from node to node. This saltatory conduction greatly increases conduction speed and saves metabolic energy.
'Myelin gap' and 'axonal void' are not technical terms, and Schwann cells are the glial cells that produce myelin rather than the gaps between myelin segments.
Hence, the answer is Nodes of Ranvier.
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Important Questions from Human body
- Which of the following minerals is essential for oxygen transport in the blood?
- How many pairs of false ribs are located above the floating ribs that are connected to each other by costal cartilage?
- Which mineral helps in the formation of insulin granules, digestion, metabolism and functioning of the male prostate?
- Which of these nutrients is the main energy source for the body/ human diet?
Consider the following statements regarding diabetes:
1. It is caused by the oversecretion of insulin by pancreas.
2. The glucose level increases in the blood.
3. The patient urinates frequently, loses weight and becomes lethargic.
How many of the statements given above are correct?
