flagella

简明释义

英[fləˈdʒelə]美[fləˈdʒelə]

n. 鞭毛；鞭节（flagellum 的复数）

n. （Flagella）人名；（意）弗拉杰拉

英英释义

单词用法

同义词

反义词

例句

1.Results in all specimen, the flagella were abundant, stretched fully and were easy to find.

结果所制标本鞭毛丰富、伸展自然、清晰易找。

2.Bacteria under the microscope, even those with no flagella, often bounce about in the water.

在显微镜下面的细菌，即便是那些没有鞭毛的，也时常在水中乱跳。

3.Using special stains, one can see that some bacteria have attached to them wavy-looking "hairs" called flagella. Others have only one flagellum.

用特殊的着色剂后，你会发现有的细菌上长着不少波状的“毛发”即鞭毛，而有的细菌只有一根鞭毛。

4.As a result, bacteria have developed a unique way of swimming: using tiny rotary motors called flagella, which resemble corkscrews.

结果细菌进化出独特的游泳方式：使用叫做鞭毛的像螺旋开瓶器的微型旋转马达。

5.The fusion of flagella and median cytoplasmic process happens when they have grown to a certain length.

鞭毛和中央胞质区的融合在两者已分别生长到相当长度后才开始。

6.Strictly, the term flagella should be used only in relation to bacteria.

严格来说，“鞭毛”应该仅用于描述细菌的结构。

7.The bacterium moves through liquid by using its flagella.

这种细菌通过使用它的鞭毛在液体中移动。

8.Many protozoa are equipped with flagella for locomotion.

许多原生动物配备有鞭毛用于运动。

9.The study focused on how flagella contribute to the swimming speed of sperm cells.

这项研究集中于鞭毛如何影响精子细胞的游泳速度。

10.Some algae utilize flagella to move towards light.

一些藻类利用鞭毛朝向光源移动。

11.The structure of flagella is crucial for their function in motility.

在运动功能中，鞭毛的结构至关重要。

作文

In the study of biology, one encounters a plethora of fascinating structures and mechanisms that enable life as we know it. Among these, the term flagella (鞭毛) stands out as a critical component for many microorganisms. Flagella are long, whip-like appendages that protrude from the cell body of certain bacteria, archaea, and eukaryotic cells. They play an essential role in locomotion, allowing these organisms to swim through liquid environments. The structure of flagella varies greatly among different species, but they generally consist of three main parts: the basal body, the hook, and the filament. The basal body anchors the flagella to the cell's membrane and acts as a motor, converting chemical energy into mechanical energy. The hook serves as a flexible connector, allowing the filament to rotate freely. Finally, the filament is the long, helical structure that extends outward, propelling the organism forward when it rotates. This intricate design allows for efficient movement, which is vital for survival in competitive environments. One of the most interesting aspects of flagella is their role in the pathogenicity of certain bacteria. For example, the bacterium *Escherichia coli*, which can be harmless or harmful depending on its strain, utilizes flagella to navigate through the intestinal tract. This mobility facilitates its colonization and can lead to infections if pathogenic strains are present. Understanding how flagella function not only sheds light on microbial motility but also aids in developing strategies to combat bacterial infections. In addition to their role in bacteria, flagella are also found in some eukaryotic cells, such as sperm cells in animals. The flagella in these cells are structurally different from those in bacteria, being made up of a complex arrangement of microtubules. This difference highlights the diversity of life and the various evolutionary pathways that have led to similar functional adaptations, like movement. Moreover, the study of flagella extends beyond their biological significance. Researchers have begun to explore the potential applications of flagella in biotechnology and medicine. For instance, scientists are investigating the use of engineered bacteria with enhanced motility to target and destroy cancer cells. By harnessing the natural movement capabilities of flagella, it may be possible to create novel therapeutic approaches that are more effective and less invasive than traditional methods. In conclusion, flagella (鞭毛) are remarkable structures that exemplify the complexity of life at the microscopic level. Their ability to facilitate movement is crucial for many organisms, influencing their survival, reproduction, and interaction with their environment. Furthermore, the ongoing research into flagella continues to unveil new possibilities in science and medicine, showcasing the importance of understanding these tiny yet powerful appendages. As we deepen our knowledge of flagella, we open doors to innovations that could significantly impact health and technology in the future.

在生物学的研究中，人们会遇到许多迷人的结构和机制，这些结构和机制使生命得以存在。在这些结构中，术语flagella（鞭毛）作为许多微生物的关键组成部分而脱颖而出。Flagella是从某些细菌、古菌和真核细胞的细胞体突出的长鞭状附肢。它们在运动中发挥着重要作用，使这些生物能够在液体环境中游动。Flagella的结构在不同物种之间差异很大，但通常由三个主要部分组成：基体、钩和纤维。 基体将flagella锚定在细胞膜上，并作为电动机，将化学能转化为机械能。钩作为灵活的连接器，允许纤维自由旋转。最后，纤维是向外延伸的长螺旋结构，当其旋转时推动生物体向前移动。这一复杂的设计使得高效的运动成为可能，这对在竞争环境中的生存至关重要。 Flagella最有趣的方面之一是它们在某些细菌致病性中的作用。例如，细菌*大肠杆菌*，根据其菌株可以是无害或有害，利用flagella在肠道中游动。这种运动性促进了其定殖，并且如果存在致病菌株，可能导致感染。理解flagella的功能不仅揭示了微生物运动的奥秘，还帮助开发对抗细菌感染的策略。 除了在细菌中的作用，flagella还存在于一些真核细胞中，例如动物的精子细胞。这些细胞中的flagella在结构上与细菌中的不同，由微管的复杂排列构成。这一差异突显了生命的多样性以及导致类似功能适应（如运动）的各种进化途径。 此外，对flagella的研究超出了其生物学意义。研究人员开始探索在生物技术和医学中的潜在应用。例如，科学家正在研究利用增强运动能力的工程细菌来靶向和摧毁癌细胞。通过利用flagella的自然运动能力，可能创造出比传统方法更有效且侵入性更小的新型治疗方法。 总之，flagella（鞭毛）是杰出的结构，体现了微观层面生命的复杂性。它们促进运动的能力对许多生物至关重要，影响着它们的生存、繁殖和与环境的互动。此外，对flagella的持续研究不断揭示出科学和医学中的新可能性，展示了理解这些微小但强大的附肢的重要性。随着我们深入了解flagella，我们为未来健康和技术的创新打开了大门。