ureotelism

简明释义

英[ˌjʊərəʊˈtɛlɪzəm]美[ˌjʊrəˈtɛlɪzəm]

n. [生理] 排尿素代谢

英英释义

单词用法

同义词

反义词

例句

1.The contents of ureotelism and globulin increased and hemoglobin decreased with inbreeding coefficient in systematic breeding.

尿素氮和球蛋白含量在系统选择中随近交系数的上升而下降，血红素含量却上升。

2.The contents of ureotelism and globulin increased and hemoglobin decreased with inbreeding coefficient in systematic breeding.

尿素氮和球蛋白含量在系统选择中随近交系数的上升而下降，血红素含量却上升。

3.Many terrestrial animals exhibit ureotelism, which is the excretion of urea as the main nitrogenous waste product.

许多陆生动物表现出尿素排泄作用，即将尿素作为主要的氮废物排泄。

4.In humans, ureotelism is crucial for maintaining nitrogen balance and preventing toxicity.

在人体中，尿素排泄作用对于维持氮平衡和防止毒性至关重要。

5.Fish generally do not use ureotelism; instead, they primarily excrete ammonia directly into the water.

鱼类通常不使用尿素排泄作用; 相反，它们主要将氨直接排放到水中。

6.The evolutionary advantage of ureotelism allows certain animals to conserve water in arid environments.

在干旱环境中，尿素排泄作用的进化优势使某些动物能够节约水分。

7.Mammals are known for their ureotelism, which helps them adapt to life on land.

哺乳动物以其尿素排泄作用而闻名，这帮助它们适应陆地生活。

作文

In the fascinating world of biology, various organisms have developed unique adaptations to survive in their environments. One such adaptation is known as ureotelism, which refers to the excretion of urea as the primary nitrogenous waste product. This process is particularly common among terrestrial animals, including mammals and amphibians. Understanding ureotelism is crucial for comprehending how different species manage waste and maintain homeostasis in their bodies. To appreciate the significance of ureotelism, it is essential to compare it with other forms of nitrogenous waste excretion, such as ammonotelism and uricotelism. Ammonotelism is the process where ammonia, a highly toxic compound, is excreted directly into the water by aquatic organisms, while uricotelism involves the excretion of uric acid, which is less toxic and conserves water, making it ideal for organisms living in arid environments. In contrast, ureotelism allows terrestrial animals to convert ammonia into urea, which is less toxic and can be safely stored in the body until it is excreted through urine. The evolution of ureotelism is a remarkable adaptation that enables organisms to thrive in environments where water conservation is vital. For instance, mammals, including humans, utilize ureotelism to efficiently manage nitrogen waste. The liver plays a crucial role in this process by converting ammonia, which is generated during protein metabolism, into urea through the urea cycle. This conversion not only detoxifies ammonia but also reduces the amount of water needed for excretion, allowing mammals to survive in diverse habitats. Moreover, ureotelism has significant implications for the overall physiology of an organism. Since urea is less toxic than ammonia, it can be transported in the bloodstream to the kidneys, where it is filtered and concentrated in urine. This ability to regulate nitrogenous waste effectively contributes to maintaining the body's internal environment, ensuring that harmful substances do not accumulate. In addition to mammals, some amphibians also exhibit ureotelism. Frogs, for example, undergo metamorphosis from a tadpole stage, where they primarily excrete ammonia, to an adult stage, where they switch to excreting urea. This transition reflects their adaptation to a more terrestrial lifestyle, highlighting the importance of ureotelism in their development and survival. Furthermore, understanding ureotelism is essential for various fields, including ecology, medicine, and environmental science. For instance, studying how different species excrete nitrogenous waste can provide insights into their ecological roles and adaptations. In medicine, knowledge of ureotelism helps in understanding metabolic disorders related to urea cycle dysfunctions, which can lead to severe health issues. In conclusion, ureotelism is a vital biological process that exemplifies the incredible adaptations organisms have evolved to cope with their environments. By excreting urea, terrestrial animals can manage nitrogen waste effectively while conserving water, showcasing the intricate balance of life on Earth. As we continue to explore the complexities of biology, the study of ureotelism will undoubtedly remain a significant area of interest, offering valuable insights into the physiological and ecological dynamics of various species.

在生物学的迷人世界中，各种生物为了在其环境中生存，发展出了独特的适应性。其中一种适应性被称为尿素排泄，指的是将尿素作为主要氮废物排泄的过程。这一过程在陆生动物中尤为常见，包括哺乳动物和两栖动物。理解尿素排泄对于理解不同物种如何管理废物和维持体内稳态至关重要。 要欣赏尿素排泄的重要性，必须将其与其他形式的氮废物排泄进行比较，例如氨排泄和尿酸排泄。氨排泄是水生生物直接将氨（一种高度毒性化合物）排泄到水中的过程，而尿酸排泄则涉及排泄尿酸，这种物质毒性较低并且能够节约水分，适合生活在干旱环境中的生物。相比之下，尿素排泄使陆生动物能够将氨转化为尿素，尿素毒性较低，可以安全地储存在体内，直到通过尿液排出。 尿素排泄的进化是一种显著的适应性，使生物能够在水分保存至关重要的环境中生存。例如，哺乳动物，包括人类，利用尿素排泄有效管理氮废物。肝脏在这一过程中发挥着关键作用，通过尿素循环将蛋白质代谢过程中产生的氨转化为尿素。这一转化不仅解毒氨，还减少了排泄所需的水量，使哺乳动物能够在多样的栖息地中生存。 此外，尿素排泄对生物的整体生理也有重大影响。由于尿素比氨毒性低，它可以通过血液运输到肾脏，在那里被过滤并浓缩在尿液中。这种有效调节氮废物的能力有助于维持体内环境，确保有害物质不会积累。 除了哺乳动物，一些两栖动物也表现出尿素排泄。例如，青蛙在从蝌蚪阶段（主要排泄氨）向成年阶段（转而排泄尿素）发生变态时，体现了它们向更陆生生活方式的适应，这突显了尿素排泄在它们发育和生存中的重要性。 此外，了解尿素排泄对生态学、医学和环境科学等多个领域至关重要。例如，研究不同物种如何排泄氮废物可以提供关于它们生态角色和适应性的见解。在医学中，关于尿素排泄的知识有助于理解与尿素循环功能障碍相关的代谢疾病，这可能导致严重的健康问题。 总之，尿素排泄是一个重要的生物过程，体现了生物为应对其环境而进化出的惊人适应性。通过排泄尿素，陆生动物能够有效管理氮废物，同时节约水分，展示了地球生命的微妙平衡。随着我们继续探索生物学的复杂性，尿素排泄的研究无疑将继续成为一个重要的研究领域，为各种物种的生理和生态动态提供有价值的见解。