holocrine

简明释义

英[ˈhɒləkrɪn]美[ˈhɑːloʊˌkrɪn;ˈhoʊləˌkrɪn]

adj. （腺分泌物）全浆分泌的

英英释义

单词用法

同义词

反义词

例句

1.Venom is produced by holocrine glands in the spider's chelicerae (mouth parts).

毒液是由蜘蛛螯（嘴部）的全分泌腺产生的。

2.Venom is produced by holocrine glands in the spider's chelicerae (mouth parts).

毒液是由蜘蛛螯（嘴部）的全分泌腺产生的。

3.The sebaceous glands are classified as holocrine 全细胞分泌腺 because they release entire cells along with their secretions.

皮脂腺被归类为holocrine 全细胞分泌腺，因为它们会释放整个细胞及其分泌物。

4.In a holocrine 全细胞分泌腺 secretion process, the cells accumulate lipids before they disintegrate to release their contents.

在holocrine 全细胞分泌腺分泌过程中，细胞在崩解之前会积累脂质以释放其内容物。

5.The study of holocrine 全细胞分泌腺 glands can provide insights into skin health and disorders.

对holocrine 全细胞分泌腺腺体的研究可以提供有关皮肤健康和疾病的见解。

6.Unlike merocrine glands, holocrine 全细胞分泌腺 contribute whole cells to their secretions.

与外分泌腺不同，holocrine 全细胞分泌腺将完整的细胞贡献给它们的分泌物。

7.The function of holocrine 全细胞分泌腺 glands is crucial for maintaining the moisture of the skin.

holocrine 全细胞分泌腺腺体的功能对于维持皮肤的湿润至关重要。

作文

In the study of human physiology, various types of glandular secretions play crucial roles in maintaining homeostasis and facilitating bodily functions. One such type of secretion is known as holocrine, which refers to a specific mechanism of secretion where entire cells are shed from the gland and become part of the secretion. This process is particularly important in certain glands, such as sebaceous glands found in the skin. The holocrine mechanism differs significantly from other types of glandular secretions, such as merocrine and apocrine secretions. To understand the significance of holocrine secretion, it is essential to first explore how it contrasts with the other two mechanisms. Merocrine glands secrete their products via exocytosis, where vesicles containing the secretion fuse with the plasma membrane, releasing the substance without any loss of cellular material. An example of this would be the sweat glands that produce a watery secretion to help regulate body temperature. On the other hand, apocrine glands release their secretions by budding off a portion of their cell membrane, which includes some cytoplasm. This can be observed in mammary glands during lactation, where fat droplets are released along with the milk. The holocrine method, however, involves the complete disintegration of the glandular cells. In sebaceous glands, for instance, the cells accumulate lipids and other substances until they become engorged and eventually die, releasing their entire contents into the hair follicle. This oily secretion, known as sebum, plays a vital role in lubricating the skin and hair, providing a barrier against environmental factors, and possessing antimicrobial properties. The advantages of holocrine secretion are evident when considering the protective functions of sebum. By forming a thin layer on the skin, sebum helps to prevent dehydration and acts as a shield against pathogens. Furthermore, the lipid composition of sebum also contributes to the skin's overall health, ensuring that it remains supple and elastic. Without the action of holocrine glands, individuals might experience dry skin, increased susceptibility to infections, and other dermatological issues. Interestingly, the holocrine secretion process has implications beyond just skin health. It also reflects the body's ability to adapt and respond to various environmental stresses. For instance, during periods of increased stress or hormonal changes, the activity of sebaceous glands may increase, leading to more sebum production. This demonstrates how holocrine secretion is not merely a passive process but rather an active response to the body's needs. In conclusion, understanding the concept of holocrine secretion provides valuable insights into the complex functioning of our body's glands. By shedding entire cells as part of the secretion process, these glands contribute to essential physiological functions, particularly in maintaining skin health. The unique nature of holocrine secretion underscores the intricacies of glandular physiology and highlights the importance of these processes in our daily lives. As we continue to explore human biology, the role of holocrine glands serves as a reminder of the remarkable ways our bodies work to protect and sustain us.

在人体生理学的研究中，各种类型的腺体分泌物在维持体内平衡和促进身体功能方面发挥着至关重要的作用。其中一种分泌方式被称为holocrine，指的是一种特定的分泌机制，其中整个细胞从腺体中脱落并成为分泌物的一部分。这一过程在皮肤中的皮脂腺等某些腺体中特别重要。holocrine机制与其他类型的腺体分泌，如外分泌和顶分泌，存在显著差异。 要理解holocrine分泌的重要性，首先需要探讨它与另外两种机制的对比。外分泌腺通过胞吐作用分泌其产品，囊泡内含有分泌物，与质膜融合，释放物质而不损失任何细胞材料。例如，汗腺产生水状分泌物以帮助调节体温。另一方面，顶分泌腺通过从细胞膜上突起一部分来释放其分泌物，这包括一些细胞质。这可以在乳腺中观察到，在哺乳期间，脂肪滴与乳汁一起释放。 然而，holocrine方法涉及腺体细胞的完全解体。例如，在皮脂腺中，细胞积累脂质和其他物质，直到变得饱满并最终死亡，将其全部内容释放到毛囊中。这种油状分泌物称为皮脂，起着润滑皮肤和头发、提供对环境因素的屏障以及具有抗微生物特性的关键作用。 holocrine分泌的优势在于考虑皮脂的保护功能时显而易见。通过在皮肤上形成一层薄膜，皮脂有助于防止脱水，并充当对病原体的屏障。此外，皮脂的脂质成分也有助于皮肤的整体健康，确保皮肤保持柔软和弹性。如果没有holocrine腺体的作用，个体可能会经历干燥的皮肤、增加感染的易感性以及其他皮肤病问题。 有趣的是，holocrine分泌过程不仅在皮肤健康方面具有影响。它还反映了身体适应和应对各种环境压力的能力。例如，在压力或激素变化增加的时期，皮脂腺的活动可能会增加，导致更多皮脂的产生。这表明holocrine分泌不仅仅是一个被动过程，而是对身体需求的主动反应。 总之，理解holocrine分泌的概念为我们提供了对身体腺体复杂功能的宝贵见解。通过将整个细胞作为分泌过程的一部分排出，这些腺体对维持基本生理功能，尤其是皮肤健康，作出了贡献。holocrine分泌的独特性质强调了腺体生理学的复杂性，并突显了这些过程在我们日常生活中的重要性。在我们继续探索人体生物学时，holocrine腺体的作用提醒着我们，身体以惊人的方式工作，以保护和维持我们。