membrane permeability

简明释义

膜的渗透性

英英释义

例句

1.In drug delivery systems, enhancing membrane permeability can improve therapeutic efficacy.

在药物递送系统中，增强膜通透性可以提高治疗效果。

2.A decrease in membrane permeability can result in impaired nutrient absorption.

膜通透性的降低可能导致营养吸收受损。

3.Researchers are examining the role of cholesterol in maintaining membrane permeability.

研究人员正在研究胆固醇在维持膜通透性中的作用。

4.The study focused on how temperature affects membrane permeability.

这项研究集中在温度如何影响膜通透性。

5.Certain chemicals can disrupt membrane permeability, leading to cell damage.

某些化学物质可以破坏膜通透性，导致细胞损伤。

作文

The concept of membrane permeability is fundamental in the study of cell biology and biochemistry. It refers to the ability of a cell membrane to allow certain substances to pass through while restricting others. This selective permeability is crucial for maintaining the internal environment of the cell, known as homeostasis. Without proper membrane permeability, cells would not be able to regulate their internal conditions effectively, which could lead to cellular dysfunction or death.Cell membranes are primarily composed of a phospholipid bilayer, which provides the basic structure that defines the boundary of the cell. Embedded within this bilayer are various proteins that play key roles in transport and communication. The membrane permeability is influenced by several factors, including the size and charge of the molecules attempting to cross the membrane, the presence of specific transport proteins, and the fluidity of the lipid bilayer itself.For instance, small nonpolar molecules like oxygen and carbon dioxide can easily diffuse across the membrane due to their size and lack of charge. In contrast, larger or charged molecules, such as ions or glucose, require specialized transport mechanisms to enter or exit the cell. These mechanisms can include facilitated diffusion, active transport, and endocytosis, each having its own unique process and energy requirements.The importance of membrane permeability extends beyond individual cells; it also plays a significant role in tissue and organ function. For example, in the kidneys, the selective permeability of cell membranes allows for the reabsorption of essential nutrients and the excretion of waste products. If the membrane permeability is compromised, it can lead to conditions such as edema or dehydration, highlighting the necessity of this process in overall health.Moreover, understanding membrane permeability has practical applications in medicine and pharmacology. Many drugs are designed to interact with specific membrane proteins to enhance their therapeutic effects. Additionally, researchers are exploring ways to manipulate membrane permeability to improve drug delivery systems, ensuring that medications can effectively reach their target cells.In conclusion, membrane permeability is a critical aspect of cellular function that impacts everything from nutrient uptake to waste removal. By studying the factors that influence membrane permeability, scientists can gain insights into various biological processes and develop innovative solutions to health challenges. As we continue to explore the complexities of cell membranes, the significance of membrane permeability will undoubtedly remain a central focus in the fields of biology and medicine.

“膜通透性”这一概念在细胞生物学和生物化学研究中是基础性的。它指的是细胞膜允许某些物质通过，同时限制其他物质的能力。这种选择性通透性对于维持细胞内环境，即内稳态至关重要。如果没有适当的“膜通透性”，细胞将无法有效调节其内部条件，这可能导致细胞功能障碍或死亡。细胞膜主要由磷脂双层构成，提供了定义细胞边界的基本结构。在这一双层中嵌入了各种蛋白质，这些蛋白质在运输和通讯中发挥着关键作用。“膜通透性”受到多个因素的影响，包括试图穿越膜的分子的大小和电荷、特定运输蛋白的存在以及脂质双层本身的流动性。例如，小的非极性分子如氧气和二氧化碳可以轻松地通过膜扩散，因为它们的大小和缺乏电荷。相比之下，较大或带电的分子，如离子或葡萄糖，则需要特殊的运输机制才能进出细胞。这些机制可以包括促进扩散、主动运输和内吞作用，每种机制都有其独特的过程和能量需求。“膜通透性”的重要性超越了单个细胞；它在组织和器官功能中也发挥着重要作用。例如，在肾脏中，细胞膜的选择性通透性允许重新吸收必需的营养物质和排泄废物。如果“膜通透性”受到损害，可能会导致水肿或脱水等情况，强调了这一过程在整体健康中的必要性。此外，理解“膜通透性”在医学和药理学中具有实际应用。许多药物旨在与特定膜蛋白相互作用，以增强其治疗效果。此外，研究人员正在探索操控“膜通透性”的方法，以改善药物递送系统，确保药物能够有效到达其目标细胞。总之，“膜通透性”是影响从营养摄取到废物排除的细胞功能的关键方面。通过研究影响“膜通透性”的因素，科学家可以深入了解各种生物过程，并开发创新的健康挑战解决方案。随着我们继续探索细胞膜的复杂性，“膜通透性”的重要性无疑将继续成为生物学和医学领域的中心焦点。