membrane resistance

简明释义

薄膜电阻

英英释义

例句

1.The membrane resistance affects the efficiency of water purification systems.

膜电阻影响水净化系统的效率。

2.The study focused on the effects of temperature on membrane resistance.

这项研究集中于温度对膜电阻的影响。

3.In electrochemistry, understanding membrane resistance is crucial for optimizing cell performance.

在电化学中，理解膜电阻对优化电池性能至关重要。

4.High membrane resistance can lead to reduced ion transfer rates in batteries.

高膜电阻可能导致电池中离子转移速率降低。

5.Researchers measured the membrane resistance of various materials to find the best option for fuel cells.

研究人员测量了各种材料的膜电阻以寻找燃料电池的最佳选择。

作文

In the field of biology and physiology, understanding the concept of membrane resistance is crucial for comprehending how cells function. The term membrane resistance refers to the resistance offered by the cell membrane to the flow of ions and other charged particles. This resistance is a fundamental property of biological membranes and plays a significant role in maintaining the electrical potential across the membrane, which is essential for various cellular processes such as signal transduction, nutrient transport, and muscle contraction.To elaborate further, the cell membrane is composed of a phospholipid bilayer that acts as a barrier to most water-soluble substances. This structure contributes to the membrane resistance by impeding the movement of ions across the membrane. When ions attempt to move through the membrane, they encounter resistance, which can be quantified using Ohm's law. According to this principle, the current flowing through the membrane is directly proportional to the voltage across it and inversely proportional to the membrane resistance. Therefore, a higher membrane resistance results in a lower ionic current, which can significantly influence cellular excitability and responsiveness.The concept of membrane resistance is particularly important in the context of neuronal activity. Neurons communicate through electrical signals known as action potentials, which are generated by the rapid influx and efflux of ions across the neuronal membrane. The membrane resistance of neurons affects how easily these ions can cross the membrane, thereby influencing the generation and propagation of action potentials. A neuron with high membrane resistance will maintain a more stable resting membrane potential, making it less likely to fire an action potential unless adequately stimulated.Furthermore, membrane resistance is not a static property; it can change in response to various physiological conditions. For instance, during certain pathological conditions or in response to specific neurotransmitters, the permeability of the membrane to ions can increase, resulting in a decrease in membrane resistance. This dynamic nature of membrane resistance is vital for the adaptability of neuronal circuits and the overall plasticity of the nervous system.In addition to its role in neurons, membrane resistance is also significant in other cell types. For example, in cardiac muscle cells, membrane resistance influences the heart's rhythm and contraction strength. Changes in membrane resistance can lead to arrhythmias or other cardiac dysfunctions, highlighting the importance of this concept in medical science.In conclusion, membrane resistance is a key factor in the functioning of cells, particularly in excitable tissues like neurons and muscle cells. Understanding this concept allows scientists and medical professionals to better appreciate how cells communicate and respond to their environment. By examining the implications of membrane resistance, researchers can develop new therapeutic strategies to address various diseases and improve overall health outcomes. As we continue to explore the complexities of cellular behavior, the significance of membrane resistance will undoubtedly remain a central topic of investigation in the biological sciences.

在生物学和生理学领域，理解膜电阻的概念对于理解细胞功能至关重要。术语膜电阻指的是细胞膜对离子和其他带电粒子流动的阻力。这种阻力是生物膜的基本特性，在维持膜两侧电位方面发挥着重要作用，这对于信号转导、营养物质运输和肌肉收缩等各种细胞过程都是必不可少的。进一步阐述，细胞膜由磷脂双层组成，作为大多数水溶性物质的屏障。这一结构通过阻碍离子穿过膜的运动来贡献于膜电阻。当离子试图穿过膜时，它们会遇到阻力，这可以利用欧姆定律进行量化。根据这一原理，流经膜的电流与膜两侧的电压成正比，与膜电阻成反比。因此，更高的膜电阻会导致较低的离子电流，这可能显著影响细胞的兴奋性和反应能力。在神经元活动的背景下，膜电阻的概念尤其重要。神经元通过称为动作电位的电信号进行交流，这些信号是由离子在神经膜上迅速进出所产生的。神经元的膜电阻影响这些离子穿过膜的难易程度，从而影响动作电位的产生和传播。具有高膜电阻的神经元将维持更稳定的静息膜电位，使其不太可能在未受到充分刺激的情况下发放动作电位。此外，膜电阻并不是一个静态属性；它可以根据各种生理条件发生变化。例如，在某些病理条件下或在特定神经递质的作用下，膜对离子的通透性可能增加，从而导致膜电阻降低。这种膜电阻的动态特性对于神经回路的适应性和神经系统的整体可塑性至关重要。除了在神经元中的作用，膜电阻在其他细胞类型中也同样重要。例如，在心肌细胞中，膜电阻影响心脏的节律和收缩强度。膜电阻的变化可能导致心律失常或其他心脏功能障碍，突显了这一概念在医学科学中的重要性。总之，膜电阻是细胞功能的关键因素，尤其是在神经元和肌肉细胞等可兴奋组织中。理解这一概念使科学家和医疗专业人员能够更好地理解细胞如何与环境进行交流和响应。通过研究膜电阻的影响，研究人员可以开发新的治疗策略，以解决各种疾病并改善整体健康结果。随着我们继续探索细胞行为的复杂性，膜电阻的重要性无疑将继续成为生物科学中研究的核心主题。