concentration gradient

简明释义

浓度梯度

英英释义

例句

1.In cellular respiration, oxygen moves into the cell along the concentration gradient (浓度梯度) from an area of higher concentration to lower concentration.

在细胞呼吸中，氧气沿着浓度梯度 (浓度梯度) 从高浓度区域移动到低浓度区域。

2.The process of diffusion occurs when molecules spread out evenly in a solution, driven by the concentration gradient (浓度梯度).

扩散过程发生在分子在溶液中均匀扩散时，由浓度梯度 (浓度梯度) 驱动。

3.In the lungs, oxygen diffuses into the blood due to the concentration gradient (浓度梯度) between the alveoli and blood vessels.

在肺部，氧气由于肺泡与血管之间的浓度梯度 (浓度梯度) 而扩散进入血液。

4.During osmosis, water moves across a semi-permeable membrane from an area of low solute concentration to high solute concentration, following the concentration gradient (浓度梯度).

在渗透过程中，水分通过半透膜从低溶质浓度区域移动到高溶质浓度区域，遵循浓度梯度 (浓度梯度)。

5.Plants absorb water from the soil through their roots, moving against the concentration gradient (浓度梯度) created by transpiration.

植物通过根部从土壤中吸收水分，逆着蒸腾作用产生的浓度梯度 (浓度梯度) 移动。

作文

The concept of a concentration gradient is fundamental in various scientific fields, particularly in biology and chemistry. To understand what a concentration gradient is, we must first grasp the idea of concentration itself. Concentration refers to the amount of a substance present in a given volume of solution. A concentration gradient occurs when there is a difference in concentration of a substance across a space. This difference can lead to the movement of particles from an area of high concentration to an area of low concentration, a process known as diffusion.In biological systems, concentration gradients play a crucial role in many physiological processes. For instance, during respiration, oxygen moves from the alveoli in the lungs, where its concentration is high, into the bloodstream, where its concentration is lower. This movement occurs because of the concentration gradient that exists between these two areas. Similarly, carbon dioxide moves in the opposite direction, from the blood to the alveoli, again driven by a concentration gradient.One of the most significant examples of a concentration gradient in action is found in the process of osmosis, which is the movement of water across a selectively permeable membrane. Water molecules will move from an area of low solute concentration (high water concentration) to an area of high solute concentration (low water concentration) until equilibrium is reached. This movement is essential for maintaining cell turgor and overall cellular function.Furthermore, concentration gradients are not limited to biological contexts. In chemistry, they can influence reaction rates. When reactants are in higher concentrations, they collide more frequently, leading to a faster reaction rate. Conversely, if the concentrations are equalized, the reaction may slow down significantly. Thus, understanding concentration gradients can be pivotal in fields such as pharmacology, where drug delivery and absorption depend heavily on these principles.Moreover, concentration gradients are also utilized in technology. For example, in the field of water purification, membranes are designed to exploit concentration gradients to separate contaminants from clean water. By creating a difference in concentration across a membrane, water can be filtered effectively, providing clean drinking water to populations in need.In summary, the concept of a concentration gradient is vital for understanding many natural processes and technological applications. Whether in the movement of gases during respiration, the regulation of water in cells, or the acceleration of chemical reactions, concentration gradients dictate how substances behave in different environments. As we continue to explore the intricacies of science, recognizing the importance of concentration gradients will enhance our comprehension of both biological systems and chemical reactions, ultimately leading to advancements in various fields of study.Understanding concentration gradient helps us appreciate the delicate balance that sustains life and drives innovation in technology. It serves as a reminder of the interconnectedness of all scientific disciplines and the importance of foundational concepts in advancing our knowledge and capabilities in addressing real-world challenges.

“浓度梯度”的概念在多个科学领域中是基础性的，特别是在生物学和化学中。要理解什么是“浓度梯度”，我们首先必须掌握浓度本身的概念。浓度是指在给定体积的溶液中存在的物质的数量。当物质在空间中存在浓度差异时，就会发生“浓度梯度”。这种差异会导致粒子从高浓度区域移动到低浓度区域，这一过程被称为扩散。在生物系统中，“浓度梯度”在许多生理过程中起着至关重要的作用。例如，在呼吸过程中，氧气从肺泡（其浓度较高）移动到血液中（其浓度较低）。这种运动是因为这两个区域之间存在“浓度梯度”。同样，二氧化碳则朝相反方向移动，从血液进入肺泡，这也是由“浓度梯度”驱动的。“浓度梯度”在作用中的一个重要例子可以在渗透作用中找到，即水通过选择性透过膜的运动。水分子将从低溶质浓度（高水浓度）区域移动到高溶质浓度（低水浓度）区域，直到达到平衡。这种运动对于维持细胞膨压和整体细胞功能至关重要。此外，“浓度梯度”不仅限于生物背景。在化学中，它们可以影响反应速率。当反应物浓度较高时，它们碰撞得更频繁，从而导致反应速率加快。相反，如果浓度趋于均匀，反应可能会显著减慢。因此，理解“浓度梯度”在药理学等领域是至关重要的，因为药物的输送和吸收在很大程度上依赖于这些原理。此外，“浓度梯度”还被应用于技术领域。例如，在水净化领域，膜被设计用来利用“浓度梯度”将污染物与干净水分离。通过在膜的两侧创造浓度差，可以有效地过滤水，为需要的人口提供清洁饮用水。总之，“浓度梯度”的概念对于理解许多自然过程和技术应用至关重要。无论是在呼吸过程中气体的运动、细胞中水的调节，还是化学反应的加速，“浓度梯度”决定了物质在不同环境中的行为。随着我们继续探索科学的复杂性，认识到“浓度梯度”的重要性将增强我们对生物系统和化学反应的理解，最终推动各个研究领域的进步。理解“浓度梯度”帮助我们欣赏维持生命的微妙平衡，并推动技术创新。它提醒我们所有科学学科之间的相互联系，以及基础概念在解决现实世界挑战中的重要性。