anucleate

简明释义

英[ˌænˈjuːklieɪt]美[ˌænˈjuːklieɪt]

无核的

缺核的

英英释义

单词用法

同义词

反义词

例句

1.Erythrocytes in mammals are anucleate when mature, meaning that they lack a cell nucleus.

哺乳动物中的红细胞成熟时是无核的，这意味着它们缺乏细胞核。

2.Erythrocytes in mammals are anucleate when mature, meaning that they lack a cell nucleus.

哺乳动物中的红细胞成熟时是无核的，这意味着它们缺乏细胞核。

3.Red blood cells are typically anucleate, meaning they lack a nucleus.

红血球通常是无核的，这意味着它们缺乏细胞核。

4.Researchers study anucleate cells to understand their functions better.

研究人员研究无核的细胞，以更好地理解它们的功能。

5.The anucleate nature of some cells allows for more efficient oxygen transport.

某些细胞的无核性使氧气运输更加高效。

6.Certain types of platelets are also anucleate, playing a crucial role in clotting.

某些类型的血小板也是无核的，在凝血中发挥着至关重要的作用。

7.In mammals, mature erythrocytes are anucleate to maximize space for hemoglobin.

在哺乳动物中，成熟的红细胞是无核的，以最大限度地为血红蛋白腾出空间。

作文

In the study of cellular biology, one term that often arises is anucleate. This term refers to cells that lack a nucleus. Understanding the significance of anucleate cells is crucial for comprehending various biological processes and the functioning of different types of organisms. For instance, red blood cells in mammals are a classic example of anucleate cells. During their development, these cells lose their nuclei to maximize space for hemoglobin, the protein responsible for oxygen transport. This adaptation allows red blood cells to be more efficient in their primary function, which is vital for sustaining life. The absence of a nucleus in anucleate cells also has implications for their lifespan and functionality. Without a nucleus, these cells cannot undergo mitosis or repair themselves, leading to a limited lifespan. In the case of red blood cells, they typically live for about 120 days before being removed from circulation by the spleen and liver. This highlights the importance of continuous production of new cells from precursor stem cells in the bone marrow to maintain adequate oxygen levels in the body.Moreover, the concept of anucleate cells extends beyond just red blood cells. Certain types of platelets, which are essential for blood clotting, are also considered anucleate. Platelets are fragments derived from larger cells called megakaryocytes, which reside in the bone marrow. The absence of a nucleus in platelets allows them to be smaller and more flexible, enabling them to travel through the bloodstream and effectively respond to injuries by forming clots. The study of anucleate cells provides insight into evolutionary adaptations. Organisms have developed various strategies to enhance their survival, and the evolution of anucleate cells is a prime example of how nature optimizes function over structure. In some lower organisms, such as certain types of bacteria, cells may naturally lack a nucleus, which allows for rapid reproduction and adaptability to changing environments. However, the absence of a nucleus also poses challenges. For instance, anucleate cells cannot synthesize proteins or respond to signals in the same way that nucleated cells can. This limitation underscores the complexity of cellular functions and the intricate balance that exists within multicellular organisms. In conclusion, the term anucleate encapsulates a fascinating aspect of cellular biology. It emphasizes the diversity of cell types and the various adaptations that have evolved to meet the needs of different organisms. Understanding anucleate cells not only enhances our knowledge of biology but also sheds light on the remarkable ways life has adapted to thrive in diverse environments. As research continues to uncover the mysteries of cellular function, the role of anucleate cells will undoubtedly remain a significant area of interest for scientists and students alike.

在细胞生物学的研究中，一个常常出现的术语是无核。这个术语指的是缺乏细胞核的细胞。理解无核细胞的重要性对于理解各种生物过程和不同类型生物的功能至关重要。例如，哺乳动物的红血球就是一个经典的无核细胞的例子。在它们的发展过程中，这些细胞失去了细胞核，以最大化血红蛋白的空间，血红蛋白是负责氧气运输的蛋白质。这种适应使得红血球在其主要功能上更加高效，这对于维持生命至关重要。无核细胞中缺乏细胞核也对它们的寿命和功能产生了影响。没有细胞核，这些细胞无法进行有丝分裂或自我修复，从而导致有限的寿命。就红血球而言，它们通常在循环中存活约120天，然后被脾脏和肝脏清除。这突显了持续从骨髓中的前体干细胞生产新细胞以维持体内充足氧气水平的重要性。此外，无核细胞的概念不仅限于红血球。某些类型的血小板也是被认为是无核的，血小板对血液凝固至关重要。血小板是来自骨髓中大型细胞——巨核细胞的碎片。血小板中缺乏细胞核使得它们更小且更灵活，使其能够在血液中流动并有效响应伤害，通过形成血块来止血。对无核细胞的研究为我们提供了对进化适应的洞察。生物体发展出各种策略以增强其生存能力，而无核细胞的进化就是自然优化功能而非结构的一个典范。在某些较低的生物中，例如某些类型的细菌，细胞可能自然缺乏细胞核，这使得它们能够快速繁殖并适应变化的环境。然而，缺乏细胞核也带来了挑战。例如，无核细胞无法像有核细胞那样合成蛋白质或对信号作出反应。这一限制突显了细胞功能的复杂性以及多细胞生物内部存在的微妙平衡。总之，术语无核概括了细胞生物学的一个迷人方面。它强调了细胞类型的多样性以及为满足不同生物需求而演变出的各种适应。理解无核细胞不仅增强了我们对生物学的知识，也揭示了生命在多样环境中适应生存的非凡方式。随着研究持续揭示细胞功能的奥秘，无核细胞的角色无疑将继续成为科学家和学生们关注的重要领域。