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The axon of a nerve cell is covered by a...

The axon of a nerve cell is covered by a sheath called

A

Epineurium

B

Medulla

C

Myelin sheath

D

Neurilemma

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Neurons**: Neurons are the specialized cells of the nervous system that are responsible for transmitting nerve impulses. They consist of three main parts: the cell body, dendrites, and axon. 2. **Identifying the Axon**: The axon is the part of the neuron that conducts nerve impulses away from the cell body. It is essential for the transmission of signals in the nervous system. 3. **Covering of the Axon**: The axon is covered by a protective sheath. This sheath is crucial for the proper functioning of the axon as it helps in the conduction of nerve impulses. 4. **Naming the Sheath**: The covering of the axon is known as the "myelin sheath." This sheath is composed of layers of plasma membrane from glial cells that insulate the axon, facilitating faster transmission of electrical signals. 5. **Conclusion**: Therefore, the axon of a nerve cell is covered by a sheath called the myelin sheath. **Final Answer**: The axon of a nerve cell is covered by a sheath called the myelin sheath. ---
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A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon. There are two types of axons, namely, myelinated, and nonmyelinated. Which of the following is true for nerve ? i. The myelinated nerve fibres are enveloped with Schwann cells ii. Schwann cells form a myelin sheath around the axom iii. The gaps between two adjacent myelin sheaths are called nodes of Ranvier. iv.Myelinated nerve fibres are found in autonomous and the somatic neural systems v. Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon. vi. Unmyelinated nerve fibre is commonly found in spinal and cranial nerves