myelin

简明释义

英[ˈmaɪəlɪn]美[ˈmaɪəlɪn]

n. 髓磷脂（等于 myeline）

英英释义

单词用法

同义词

反义词

例句

1.When the myelin is destroyed, the nerves misfire, and nerve impulses can be slowed or disrupted.

当髓鞘被破坏，神经纤维传导阈值降低，神经冲动传导变慢或被分散。

2.In multiple sclerosis, there is patchy loss and scarring of this myelin sheath sclerosis means scars.

在多发性硬化症，有片状的损失和疤痕本髓鞘硬化手段的伤疤。

3.Like rubber insulation around electrical wires, myelin wraps around message-sending axons, protecting and speeding electrical impulses.

与电线四周围的橡胶绝缘层相类似，髓鞘环绕着发送信息的轴突，保护和加快着电脉冲。

4.The myelin was harder to see, a faintly undulating fringe on the edge of the neurons.

髓磷脂是很难看到的。它就象模模糊糊的、起伏波动的饰缘镶在神经元的边缘上。

5.Conclusion The close contact exists in microglia and neurons, myelin, interactive connection was exist in microglia and astrocyte.

结论小胶质细胞与神经元，髓鞘存在密切接触，与星形胶质细胞之间存在交互性连接。

6.While a myelin coating greatly accelerates an axon's bandwidth, it also inhibits the growth of new branches from the axon.

髓鞘化的外层能够提高轴突的传输速度，但它也限制了轴突上新的分支生长。

7.Brain biopsy revealed severe damage to the myelin sheath. Question is, why?

脑活检显示有严重的髓鞘损伤问题是为什么会这样？

8.Surrounding the axon is a myelin sheath, which is actually just insulation.

周围的轴突是一个髓鞘，实际上仅仅是绝缘的。

9.Multiple sclerosis is characterized by the degradation of myelin in the central nervous system.

多发性硬化症的特征是中枢神经系统中髓鞘的退化。

10.Research shows that myelin plays a role in learning and memory.

研究表明，髓鞘在学习和记忆中起着作用。

11.The thickness of myelin affects the speed of neural transmission.

髓鞘的厚度影响神经传导的速度。

12.Damage to the myelin sheath can lead to neurological disorders.

对髓鞘的损伤可能导致神经系统疾病。

13.The presence of myelin is crucial for the fast conduction of nerve impulses.

存在的髓鞘对神经冲动的快速传导至关重要。

作文

Myelin is a crucial component of the nervous system, playing a vital role in the transmission of electrical signals within the body. This fatty substance forms a protective sheath around nerve fibers, allowing for faster and more efficient communication between neurons. The presence of myelin (髓鞘) significantly enhances the speed of signal conduction, which is essential for proper functioning of both the central and peripheral nervous systems.To understand the importance of myelin (髓鞘), one must consider how nerve impulses travel. Neurons communicate through a process known as action potentials, where electrical signals are generated and propagated along the axon. In unmyelinated fibers, these signals travel at a relatively slow pace. However, when an axon is wrapped in myelin (髓鞘), the signal can jump from one node of Ranvier to another in a process called saltatory conduction. This leapfrogging effect allows for much quicker transmission, sometimes reaching speeds of up to 120 meters per second.The production of myelin (髓鞘) is primarily carried out by two types of glial cells: oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. These cells wrap around the axons, forming multiple layers of myelin (髓鞘) that create an insulating barrier. This insulation not only speeds up signal transmission but also protects the nerve fibers from damage and ensures that signals do not dissipate into surrounding tissues.Demyelination, the loss or damage of myelin (髓鞘), can lead to severe neurological disorders. Conditions such as multiple sclerosis (MS) are characterized by the immune system mistakenly attacking the myelin (髓鞘), resulting in disrupted communication between the brain and the rest of the body. Symptoms can range from fatigue and weakness to more severe complications such as paralysis or loss of coordination. Understanding the role of myelin (髓鞘) in these conditions is crucial for developing effective treatments and therapies.Moreover, research into myelin (髓鞘) has opened new avenues in neuroscience and regenerative medicine. Scientists are exploring ways to promote remyelination, the process of repairing damaged myelin (髓鞘). By stimulating the production of oligodendrocytes or finding compounds that encourage the regeneration of myelin (髓鞘), there is potential for restoring function in individuals affected by demyelinating diseases.In conclusion, myelin (髓鞘) is not just a simple fatty layer; it is a fundamental element that ensures the efficiency and integrity of our nervous system. Its role in facilitating rapid signal transmission highlights its importance in maintaining overall health and functionality. As research continues to advance, a deeper understanding of myelin (髓鞘) could lead to breakthroughs in treating neurological disorders and improving the quality of life for those affected. Therefore, recognizing the significance of myelin (髓鞘) is essential for anyone interested in the complexities of human biology and medicine.

髓鞘是神经系统的重要组成部分，在体内电信号的传输中发挥着至关重要的作用。这种脂肪物质在神经纤维周围形成保护性鞘层，使得神经元之间的交流更快、更高效。myelin（髓鞘）的存在显著提高了信号传导的速度，这对中枢神经系统和外周神经系统的正常功能至关重要。要理解myelin（髓鞘）的重要性，必须考虑神经冲动如何传播。神经元通过一种称为动作电位的过程进行通信，其中产生并沿轴突传播电信号。在无髓鞘的纤维中，这些信号的传播速度相对较慢。然而，当轴突被包裹在myelin（髓鞘）中时，信号可以通过一种称为跳跃传导的过程从一个兰氏结跳到另一个兰氏结。这种跳跃效应使得传输速度大大加快，有时可以达到每秒120米。myelin（髓鞘）的产生主要由两种类型的胶质细胞完成：中枢神经系统中的少突胶质细胞和外周神经系统中的施旺细胞。这些细胞缠绕在轴突周围，形成多层myelin（髓鞘），创建一个绝缘屏障。这种绝缘不仅加快了信号传输，还保护神经纤维免受损伤，并确保信号不会散失到周围组织中。脱髓鞘，即myelin（髓鞘）的丧失或损伤，可能导致严重的神经疾病。多发性硬化症（MS）等疾病的特征是免疫系统错误地攻击myelin（髓鞘），导致大脑与身体其他部分之间的通信受到干扰。症状可以从疲劳和虚弱到更严重的并发症，如瘫痪或协调能力丧失。了解myelin（髓鞘）在这些疾病中的作用对于开发有效的治疗和疗法至关重要。此外，对myelin（髓鞘）的研究为神经科学和再生医学开辟了新的途径。科学家们正在探索促进再髓鞘化的方法，即修复受损myelin（髓鞘）的过程。通过刺激少突胶质细胞的产生或寻找能够促进myelin（髓鞘）再生的化合物，有可能恢复受脱髓鞘疾病影响的个体的功能。总之，myelin（髓鞘）不仅仅是一层简单的脂肪层；它是确保我们神经系统效率和完整性的基本元素。它在促进快速信号传输方面的作用突显了它在维持整体健康和功能中的重要性。随着研究的不断推进，对myelin（髓鞘）的深入理解可能会导致在治疗神经疾病方面的突破，并改善受影响者的生活质量。因此，认识到myelin（髓鞘）的重要性对于任何对人类生物学和医学复杂性感兴趣的人来说都是必不可少的。