pseudopodia

简明释义

英[ˌsuːdəˈpoʊdiə]美[ˌsuːdəˈpoʊdiə]

n. 伪足（pseudopodium 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.The pseudopodia and microvilli on the glioma cell surface are associated with the invasive ability of the glioma cells.

胶质瘤的微绒毛和伪足结构与其侵袭性相关。

2.Many protoctistans are motile, using pseudopodia, cilia or flagella.

许多原生动物利用伪足、纤毛或鞭毛能运动。

3.The microfilaments in the microvilli and pseudopodia are the skeleton of the movement.

微绒毛及伪足内的微丝是其运动的骨架结构。

4.Osteoclasts had 4 to 6 big nuclei, and cytoplasm extended pseudopodia of filament or sheet shape.

破骨细胞细胞核核大，4 ~6个，胞浆伸出丝状或片状伪足。

5.The microfilament in the microvilli and pseudopodia is the motion skeleton of cancer cells.

微绒毛及伪足内的微丝是瘤细胞的运动骨架。

6.The pseudopodia and microvilli on the glioma cell surface are associated with the invasive ability of the glioma cells.

胶质瘤的微绒毛和伪足结构与其侵袭性相关。

7.Some protists use pseudopodia for both locomotion and feeding.

一些原生生物既用伪足进行运动，也用它们进食。

8.The study of pseudopodia can provide insights into cellular movement and behavior.

对伪足的研究可以提供关于细胞运动和行为的见解。

9.In certain white blood cells, pseudopodia help in engulfing pathogens.

在某些白血球中，伪足有助于吞噬病原体。

10.The amoeba moves by extending its pseudopodia which are temporary projections of its cytoplasm.

变形虫通过伸展其伪足，即细胞质的临时突起，来移动。

11.The formation of pseudopodia is a key characteristic of amoeboid movement.

形成伪足是变形运动的一个关键特征。

作文

The fascinating world of single-celled organisms often reveals complex structures and functions that are essential for their survival. One of the most intriguing features found in certain protozoa is the presence of pseudopodia, which are temporary projections of the cell's cytoplasm. These extensions play a crucial role in the movement and feeding mechanisms of these organisms. Understanding pseudopodia not only enhances our knowledge of cellular biology but also provides insights into the evolutionary adaptations of life forms on Earth.

To begin with, pseudopodia are primarily used for locomotion. Protozoa such as amoebas utilize these extensions to move through their environment. By extending their pseudopodia in the direction they wish to travel, they can anchor one end of their body and pull the rest of themselves forward. This method of movement is known as amoeboid movement, which is characterized by the fluidity and flexibility of the cell membrane. The ability to form pseudopodia allows these organisms to navigate through various substrates, whether it be water, soil, or other surfaces, showcasing an impressive adaptability.

Moreover, pseudopodia also serve a vital function in the feeding behavior of many protozoa. These organisms are often heterotrophic, meaning they obtain their nutrients by consuming other organisms. When a protozoan encounters food particles, it can extend its pseudopodia to surround the particle, a process known as phagocytosis. Once the food is engulfed, the cell can then digest it within a food vacuole formed by the fusion of the pseudopodia around the particle. This remarkable capability highlights the efficiency of single-celled life forms in obtaining sustenance from their surroundings.

In addition to movement and feeding, pseudopodia can play a role in cellular communication and signaling. Some studies suggest that the formation of pseudopodia can influence the way cells interact with each other, especially in multicellular organisms where cellular communication is key to maintaining homeostasis and responding to environmental changes. The ability to extend and retract these structures may allow cells to send signals or even physically connect with neighboring cells, thereby facilitating cooperative behaviors.

From an evolutionary perspective, the development of pseudopodia represents a significant adaptation that has allowed protozoa to thrive in diverse environments. These structures exemplify the ingenuity of nature in solving the challenges of mobility and resource acquisition. As researchers continue to study the mechanics of pseudopodia, they uncover more about the intricate processes that govern life at the cellular level.

In conclusion, pseudopodia are not merely extensions of a cell; they are dynamic tools that facilitate movement, feeding, and communication in single-celled organisms. The study of these structures offers valuable insights into the complexity of life and the evolutionary strategies that have emerged over millions of years. As we delve deeper into the microscopic world, the significance of pseudopodia will undoubtedly continue to unfold, revealing the remarkable capabilities of even the simplest forms of life.

单细胞生物的迷人世界常常揭示出复杂的结构和功能，这些结构和功能对于它们的生存至关重要。在某些原生动物中，最引人入胜的特征之一是存在伪足，这是一种细胞质的临时突起。这些突起在这些生物的运动和进食机制中发挥着关键作用。理解伪足不仅增强了我们对细胞生物学的知识，还提供了对地球上生命形式进化适应的深刻见解。首先，伪足主要用于运动。像变形虫这样的原生动物利用这些突起在环境中移动。通过向它们希望前进的方向伸展伪足，它们可以锚定身体的一端并拉动其余部分向前移动。这种运动方式被称为变形运动，其特征在于细胞膜的流动性和灵活性。形成伪足的能力使这些生物能够在水、土壤或其他表面上导航，展示了令人印象深刻的适应能力。此外，伪足在许多原生动物的进食行为中也发挥着重要作用。这些生物通常是异养的，意味着它们通过消费其他生物来获取营养。当原生动物遇到食物颗粒时，它可以伸展其伪足来包围颗粒，这一过程被称为吞噬作用。一旦食物被吞噬，细胞就可以在由伪足围绕颗粒形成的食物泡中消化它。这种显著的能力突显了单细胞生命形式在从周围环境中获取营养方面的高效性。除了运动和进食，伪足在细胞之间的通信和信号传递中也可能发挥作用。一些研究表明，伪足的形成可能会影响细胞相互作用的方式，特别是在多细胞生物中，细胞通信对于维持稳态和响应环境变化至关重要。伸展和收缩这些结构的能力可能使细胞能够发送信号，甚至与邻近细胞物理连接，从而促进合作行为。从进化的角度来看，伪足的发展代表了一种重要的适应，使原生动物能够在多样的环境中生存。这些结构体现了自然在解决运动和资源获取挑战方面的智慧。随着研究人员继续研究伪足的机制，他们揭示了支配生命的复杂过程。总之，伪足不仅仅是细胞的延伸；它们是促进单细胞生物运动、进食和通信的动态工具。对这些结构的研究提供了对生命复杂性的宝贵见解，以及数百万年来出现的进化策略。随着我们更深入地探索微观世界，伪足的重要性无疑将继续展开，揭示即使是最简单生命形式的非凡能力。