myofilament

简明释义

英[ˌmaɪəʊˈfɪləmənt]美[ˌmaɪəˈfɪləmənt]

n. [解剖] 肌丝

英英释义

单词用法

同义词

反义词

例句

1.Electron microscope showed there were myofilament and collagenous fibril in the cell plasm.

电镜可见胞浆内含肌丝及胶原原纤维。

2.Organelles, myofilament and dense body were well organized in the smooth muscle cells.

细胞内见各种细胞器，肌丝及致密体平行整齐排列。

3.Electron microscope showed there were myofilament and collagenous fibril in the cell plasm.

电镜可见胞浆内含肌丝及胶原原纤维。

4.Local myofilament dissolving was found in group c.

组可见局部肌丝溶解。

5.During muscle contraction, the myofilament 肌丝 slide past each other, resulting in shortening of the muscle.

在肌肉收缩过程中，myofilament 肌丝相互滑动，导致肌肉缩短。

6.The arrangement of myofilament 肌丝 within a muscle fiber is crucial for its function.

肌肉纤维内myofilament 肌丝的排列对于其功能至关重要。

7.The contraction of muscle fibers is primarily due to the interaction of actin and myosin, which are types of myofilament 肌丝.

肌肉纤维的收缩主要是由于肌动蛋白和肌球蛋白之间的相互作用，它们是两种类型的myofilament 肌丝。

8.Researchers study the structural properties of myofilament 肌丝 to understand muscle diseases better.

研究人员研究myofilament 肌丝的结构特性，以更好地理解肌肉疾病。

9.Electron microscopy allows scientists to visualize myofilament 肌丝 at a molecular level.

电子显微镜使科学家能够在分子水平上可视化myofilament 肌丝。

作文

Myofilaments are essential components of muscle fibers that play a crucial role in the contraction and relaxation of muscles. These microscopic structures are primarily composed of proteins, specifically actin and myosin, which interact to enable muscle movement. Understanding the function and structure of myofilament (肌丝) is fundamental to the study of muscle physiology and can provide insights into various muscular disorders. In this essay, we will explore the characteristics of myofilament (肌丝), their role in muscle contraction, and their significance in health and disease.To begin with, myofilaments (肌丝) are categorized into two main types: thin filaments and thick filaments. Thin filaments are primarily made up of actin, while thick filaments are predominantly composed of myosin. The arrangement of these filaments within the muscle fiber creates a striated appearance, which is characteristic of skeletal muscle. This striation is due to the regular alternating pattern of the thin and thick filaments. When viewed under a microscope, one can observe that the myofilaments (肌丝) are organized into functional units called sarcomeres, which are the basic contractile units of muscle tissue.The process of muscle contraction begins when a nerve signal triggers the release of calcium ions from the sarcoplasmic reticulum. These calcium ions bind to a protein called troponin, which is located on the thin filaments. This binding causes a conformational change that moves another protein, tropomyosin, away from the binding sites on actin. As a result, myosin heads on the thick filaments can attach to the exposed binding sites on actin, forming cross-bridges. This interaction between actin and myosin is what allows muscles to contract. The myofilament (肌丝) sliding mechanism, known as the sliding filament theory, explains how these filaments slide past each other to shorten the muscle fiber, leading to contraction.Moreover, the importance of myofilaments (肌丝) extends beyond just muscle contraction. They are also involved in maintaining muscle structure and integrity. Any disruption in the function or structure of myofilaments (肌丝) can lead to muscular diseases such as muscular dystrophy, which is characterized by progressive weakness and degeneration of skeletal muscles. Research into the molecular mechanisms of myofilaments (肌丝) has provided valuable insights into potential therapeutic targets for treating such conditions.In addition, understanding myofilaments (肌丝) is vital for athletes and fitness enthusiasts. Training regimens that focus on strength and endurance can influence the composition and performance of myofilaments (肌丝). For instance, resistance training can lead to an increase in the size and number of myofilaments, enhancing muscle strength. Therefore, knowledge about myofilaments (肌丝) can aid individuals in optimizing their workout routines to achieve better results.In conclusion, myofilaments (肌丝) are integral to the functioning of muscles, facilitating contraction and supporting muscle structure. Their unique properties and interactions are vital for both normal muscle function and the understanding of muscular diseases. As research continues to advance, the knowledge gained about myofilaments (肌丝) will undoubtedly contribute to improved treatments for muscle-related disorders and enhanced athletic performance. By appreciating the significance of myofilaments (肌丝), we can better understand the complexities of muscle physiology and its implications for health and fitness.

肌丝是肌肉纤维的重要组成部分，在肌肉的收缩和放松中起着至关重要的作用。这些微观结构主要由蛋白质组成，特别是肌动蛋白和肌球蛋白，它们相互作用以实现肌肉运动。理解肌丝（myofilament）的功能和结构是研究肌肉生理学的基础，并可以为各种肌肉疾病提供见解。在这篇文章中，我们将探讨肌丝（myofilament）的特性、它们在肌肉收缩中的作用以及它们在健康和疾病中的重要性。首先，肌丝（myofilament）可分为两种主要类型：细丝和粗丝。细丝主要由肌动蛋白组成，而粗丝则主要由肌球蛋白组成。这些丝在肌肉纤维内的排列形成了条纹状的外观，这是骨骼肌的特征。这种条纹是由于细丝和粗丝的规律交替模式所致。当在显微镜下观察时，可以看到肌丝（myofilament）被组织成称为肌节的功能单位，肌节是肌肉组织的基本收缩单位。肌肉收缩的过程始于神经信号触发钙离子从肌浆网释放。这些钙离子与位于细丝上的一种名为肌钙蛋白的蛋白质结合。这种结合导致构象变化，使另一种蛋白质——原肌球蛋白从肌动蛋白的结合位点移开。因此，粗丝上的肌球蛋白头可以附着在暴露的肌动蛋白结合位点上，形成横桥。这种肌动蛋白和肌球蛋白之间的相互作用使得肌肉能够收缩。肌丝（myofilament）滑动机制，被称为滑动丝理论，解释了这些丝如何彼此滑动以缩短肌肉纤维，从而导致收缩。此外，肌丝（myofilament）的重要性不仅仅限于肌肉收缩。它们还参与维持肌肉的结构和完整性。任何对肌丝（myofilament）功能或结构的干扰都可能导致肌肉疾病，例如肌营养不良症，这种疾病的特征是骨骼肌的逐渐无力和退化。对肌丝（myofilament）分子机制的研究提供了有价值的见解，可以作为治疗此类疾病的潜在治疗靶点。此外，了解肌丝（myofilament）对运动员和健身爱好者来说至关重要。专注于力量和耐力的训练方案可以影响肌丝（myofilament）的组成和性能。例如，抗阻训练可以增加肌丝的大小和数量，从而增强肌肉力量。因此，关于肌丝（myofilament）的知识可以帮助个人优化其锻炼计划，以获得更好的效果。总之，肌丝（myofilament）对于肌肉的功能至关重要，促进收缩并支持肌肉结构。它们独特的特性和相互作用对正常肌肉功能以及对肌肉疾病的理解至关重要。随着研究的不断进展，关于肌丝（myofilament）的知识无疑将有助于改善肌肉相关疾病的治疗和增强运动表现。通过欣赏肌丝（myofilament）的重要性，我们可以更好地理解肌肉生理学的复杂性及其对健康和健身的影响。