plasmalemma

简明释义

英[ˌplæzməˈlemə]美[ˌplæzməˈlemə]

n. 质膜，原生质膜

复 数 p l a s m a l e m m a s 或 p l a s m a l e m m a e

英英释义

单词用法

同义词

反义词

例句

1.The primary site of ozone attack on the cell is the plasmalemma .

臭氧在细胞上侵蚀的初始部位就是质膜。

2.Immunohistochemisty: AQP3 resides in plasmalemma and cytolymph, positive staining is brown, intensity of AQP3 is lower in experiment group than in control group.

免疫组化：AQP3主要存在于细胞膜及细胞浆，免疫组化阳性染色为棕色，实验组染色强度明显低于对照组。

3.The plasmalemma was incorporated into planar bilayer lipid membrane and ion channels were measured by electrical methods.

将质膜嵌入预先涂制好的平面脂双层，然后用电学方法测定该脂双层的离子选择通透性。

4.Receptors were found on the plasmalemma of superficial and prickle cells of normal esophageal epithelia.

在正常食管上皮，表浅细胞及棘细胞的质膜上可见受体。

5.And in the proximal area of the optic lobe, some neurons, which have a large nucleus and indented folded plasmalemma, are observed, and whose cytoplasm contains a small number of mitochondria.

在视叶的近端观察到一些神经元，它们的细胞核很大，细胞膜有锯齿状的皱折，细胞质里含有少量的线粒体。

6.The undulate plasmalemma or some invaginations of plasmalemma varied in size was observed in the meristematic cells.

在分化细胞中，质膜呈波状起伏或形成某些大小不等的质膜内陷。

7.And in the proximal area of the optic lobe, some neurons, which have a large nucleus and indented folded plasmalemma, are observed, and whose cytoplasm contains a small number of mitochondria.

在视叶的近端观察到一些神经元，它们的细胞核很大，细胞膜有锯齿状的皱折，细胞质里含有少量的线粒体。

8.The plasmalemma folded entad forming wave shape.

质膜向内折叠成波浪状。

9.The vacuolated cells had larger and more invaginating plasmalemma than those in the meristemate cells.

液胞化细胞中的质膜内陷数量多，体积增大。

10.The plasmalemma 质膜 is selectively permeable, allowing only certain molecules to pass through.

质膜是选择性渗透的，仅允许某些分子通过。

11.In plant cells, the plasmalemma 质膜 is crucial for maintaining turgor pressure.

在植物细胞中，质膜对于维持膨压至关重要。

12.Transport proteins embedded in the plasmalemma 质膜 facilitate the movement of substances into and out of the cell.

嵌入质膜中的运输蛋白促进物质进出细胞。

13.The fluid mosaic model describes the structure of the plasmalemma 质膜 in detail.

流动镶嵌模型详细描述了质膜的结构。

14.The plasmalemma 质膜 serves as a barrier that separates the interior of the cell from the external environment.

质膜作为一个屏障，将细胞内部与外部环境分开。

作文

The cell is the fundamental unit of life, and understanding its structure is crucial for studying biology. One of the most important components of a cell is the membrane that surrounds it, known as the plasmalemma. The plasmalemma (质膜) serves as a barrier that separates the interior of the cell from its external environment. This membrane is not just a simple boundary; it plays a vital role in maintaining the integrity of the cell and facilitating various cellular functions.The plasmalemma is primarily composed of a phospholipid bilayer, which provides fluidity and flexibility to the membrane. Embedded within this bilayer are proteins that serve numerous functions, including transport, communication, and structural support. These proteins can act as channels or carriers that allow specific molecules to enter or exit the cell, thus regulating the internal environment of the cell. The selective permeability of the plasmalemma is essential for homeostasis, allowing the cell to maintain a stable internal condition despite changes in the external environment.In addition to its role in transport, the plasmalemma is also involved in cell signaling. Receptor proteins on the surface of the membrane can bind to signaling molecules, such as hormones or neurotransmitters, triggering a cascade of reactions within the cell. This ability to communicate with other cells and respond to external signals is crucial for processes such as growth, immune response, and tissue repair.Moreover, the plasmalemma contributes to the overall shape and structure of the cell. It interacts with the cytoskeleton, a network of protein filaments within the cell, providing mechanical support and helping the cell maintain its shape. This interaction is particularly important in specialized cells, such as muscle cells, where the plasmalemma must be able to withstand significant mechanical stress during contraction.Furthermore, the plasmalemma is involved in cell adhesion and communication with neighboring cells. The presence of glycoproteins and glycolipids on the surface of the plasmalemma allows cells to recognize each other and form connections, which is essential for tissue formation and maintenance. This cell-cell interaction is critical in many biological processes, including embryonic development and wound healing.In conclusion, the plasmalemma (质膜) is far more than just a protective barrier; it is a dynamic and multifunctional structure that plays a key role in the life of a cell. Its involvement in transport, signaling, structural integrity, and cell communication highlights its importance in maintaining cellular function and overall organism health. Understanding the complexities of the plasmalemma is essential for advancing our knowledge in fields such as cell biology, medicine, and biotechnology. As research continues to uncover the intricate mechanisms associated with the plasmalemma, we gain deeper insights into the fundamental processes that sustain life.

细胞是生命的基本单位，理解其结构对于研究生物学至关重要。细胞周围的膜被称为plasmalemma（质膜），它是细胞的重要组成部分。plasmalemma（质膜）作为一个屏障，将细胞内部与外部环境分开。这个膜不仅仅是一个简单的边界；它在维持细胞完整性和促进各种细胞功能中发挥着重要作用。plasmalemma主要由磷脂双层组成，这种结构为膜提供了流动性和灵活性。在这个双层中嵌入了许多蛋白质，这些蛋白质具有多种功能，包括运输、通信和结构支持。这些蛋白质可以作为通道或载体，允许特定分子进入或离开细胞，从而调节细胞的内部环境。plasmalemma的选择性通透性对维持内稳态至关重要，使细胞能够在外部环境变化的情况下保持稳定的内部状态。除了运输功能，plasmalemma还参与细胞信号传递。膜表面的受体蛋白可以与信号分子结合，例如激素或神经递质，从而触发细胞内的一系列反应。这种与其他细胞沟通并响应外部信号的能力对于生长、免疫反应和组织修复等过程至关重要。此外，plasmalemma也有助于细胞的整体形状和结构。它与细胞内的蛋白质微丝网络（细胞骨架）相互作用，为细胞提供机械支持，帮助细胞保持形状。这种相互作用在特殊细胞中尤为重要，例如肌肉细胞，在这些细胞中，plasmalemma必须能够承受收缩过程中产生的显著机械压力。此外，plasmalemma还参与细胞粘附和与邻近细胞的通信。plasmalemma表面存在的糖蛋白和糖脂使细胞能够识别彼此并形成连接，这对于组织的形成和维持至关重要。这种细胞间的相互作用在许多生物过程中都是关键的，包括胚胎发育和伤口愈合。总之，plasmalemma（质膜）远不止是一个保护屏障；它是一个动态的多功能结构，在细胞的生命中发挥着关键作用。它在运输、信号传递、结构完整性和细胞通信中的参与突显了它在维持细胞功能和整体生物体健康中的重要性。理解plasmalemma的复杂性对于推进我们在细胞生物学、医学和生物技术等领域的知识至关重要。随着研究不断揭示与plasmalemma相关的复杂机制，我们对维持生命的基本过程有了更深入的了解。