melanocytes

简明释义

英[ˌmɛləˈnəʊsaɪts]美[ˌmɛləˈnaɪsaɪts]

n. 生黑色素细胞（melanocyte 的复数）

英英释义

单词用法

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反义词

例句

1.People with freckles have a normal number of melanocytes; their melanocytes just create clusters of melanin.

有雀斑的人呢，他们的黑色素细胞数量是正常的，只是他们的黑色素细胞产生了一些黑素。

2.The newest treatment for vitiligo involves transplanting melanocytes from areas of normal skin color into the areas without skin color.

最新的治疗白癜风涉及从黑素细胞移植领域的正常皮肤颜色的地区没有皮肤颜色。

3.The melanocytes, which are missing in these white patchy areas, are the skin's natural protection against sun damage.

对黑素细胞，这些失踪的这些白色斑块地区，是肌肤的天然保护，防止晒伤。

4.Sunlight is therefore a stimulus for melanocytes to produce melanin because they are trying to protect the body from UV rays.

阳光能够刺激黑色素细胞产生黑素，这是因为黑素要在紫外线的辐射下保护我们的身体。

5.Vitiligo occurs when the immune cells start attacking and killing the melanocytes.

白癜风时，就会发生免疫细胞开始攻击和杀害的黑色素细胞。

6.There is an autoimmune condition called vitiligo in which melanocytes are attacked by the immune system and become too weak to produce melanin.

这种情况就是说黑色素细胞因遭到免疫系统攻击而变得虚弱，从而无法产生黑素。

7.Some skin cancers originate from abnormal melanocytes.

一些皮肤癌源于异常的黑色素细胞。

8.Exposure to sunlight stimulates melanocytes to increase melanin production.

阳光照射会刺激黑色素细胞增加黑色素的产生。

9.The primary function of melanocytes is to produce melanin, which gives color to the skin.

黑色素细胞的主要功能是产生黑色素，这使皮肤有颜色。

10.Research shows that the number of melanocytes decreases with age.

研究表明，随着年龄的增长，黑色素细胞的数量会减少。

11.Defects in melanocytes can lead to conditions like vitiligo.

在黑色素细胞中存在缺陷可能导致白癜风等疾病。

作文

The human body is a remarkable system composed of various types of cells, each with its unique functions. Among these, one particularly interesting type is the melanocytes, which are specialized skin cells responsible for producing melanin, the pigment that gives color to our skin, hair, and eyes. Understanding melanocytes is essential not only for appreciating the diversity of human appearance but also for comprehending certain medical conditions related to pigmentation.Melanocytes are primarily located in the basal layer of the epidermis, the outermost layer of the skin. They originate from neural crest cells during embryonic development and migrate to the skin where they settle and begin their function. The primary role of melanocytes is to synthesize melanin through a process called melanogenesis. Melanin serves as a natural sunscreen, absorbing harmful ultraviolet (UV) radiation from the sun, thereby protecting the deeper layers of the skin from damage. This protective mechanism is crucial, as excessive UV exposure can lead to skin cancer and other skin disorders.Interestingly, the amount and type of melanin produced by melanocytes vary among individuals, which accounts for the wide range of skin tones observed in humans. There are two main types of melanin: eumelanin, which is brown or black, and pheomelanin, which is yellow or red. The ratio of these two types determines an individual's overall skin color. For instance, people with darker skin have a higher concentration of eumelanin, while those with lighter skin tend to have more pheomelanin.Apart from their role in pigmentation, melanocytes also play a part in protecting the skin from oxidative stress. When the skin is exposed to UV light, it triggers the production of melanin as a defense mechanism. However, if the melanocytes are damaged or dysfunctional, it can lead to various skin conditions. One such condition is vitiligo, where melanocytes are destroyed, resulting in white patches on the skin. Another condition is hyperpigmentation, where there is an overproduction of melanin, leading to dark spots or areas on the skin.Research into melanocytes has also opened doors for advancements in cosmetic and medical treatments. For example, understanding how to stimulate melanocytes can lead to better tanning products or therapies for conditions like vitiligo. Furthermore, scientists are exploring the links between melanocytes and melanoma, a serious form of skin cancer that arises from these very cells. By studying the genetic and environmental factors that affect melanocytes, researchers hope to develop more effective prevention and treatment strategies.In conclusion, melanocytes are vital cells that contribute significantly to our skin's health and appearance. Their ability to produce melanin not only protects us from harmful UV rays but also plays a crucial role in defining our physical identity. As we continue to explore the complexities of melanocytes, we gain valuable insights into both the beauty and vulnerability of human skin. Therefore, understanding these cells is not just a matter of biological interest; it also has profound implications for health, aesthetics, and the ongoing fight against skin-related diseases.

人体是一个由多种细胞组成的奇妙系统，每种细胞都有其独特的功能。其中，一个特别有趣的细胞类型是黑色素细胞，它们是专门负责产生黑色素的皮肤细胞，黑色素是赋予我们的皮肤、头发和眼睛颜色的色素。了解黑色素细胞不仅对欣赏人类外貌的多样性至关重要，而且对于理解与色素相关的某些医学状况也很重要。黑色素细胞主要位于表皮的基底层，即皮肤的最外层。它们在胚胎发育过程中起源于神经嵴细胞，并迁移到皮肤中，在那里定居并开始其功能。黑色素细胞的主要作用是通过一种称为黑色素生成的过程合成黑色素。黑色素作为一种天然防晒剂，能够吸收来自阳光的有害紫外线（UV）辐射，从而保护皮肤的深层组织免受损害。这种保护机制至关重要，因为过度的紫外线暴露可能导致皮肤癌和其他皮肤疾病。有趣的是，黑色素细胞产生的黑色素的数量和类型因个体而异，这解释了人类肤色的广泛差异。黑色素主要有两种类型：真黑色素，呈棕色或黑色；黄黑色素，呈黄色或红色。这两种类型的比例决定了个体的整体肤色。例如，肤色较深的人具有更高浓度的真黑色素，而肤色较浅的人则往往更多地含有黄黑色素。除了在色素沉着中的作用外，黑色素细胞还在保护皮肤免受氧化压力方面发挥作用。当皮肤暴露在紫外线下时，它会触发黑色素的产生作为防御机制。然而，如果黑色素细胞受到损伤或功能失调，可能会导致各种皮肤病。一种这样的疾病是白癜风，黑色素细胞被破坏，导致皮肤上出现白斑。另一种情况是色素沉着过度，黑色素的过度生产导致皮肤上的暗斑或区域。对黑色素细胞的研究还为美容和医疗治疗的进步开辟了道路。例如，了解如何刺激黑色素细胞可以导致更好的晒黑产品或治疗白癜风等疾病的疗法。此外，科学家们正在探索黑色素细胞与黑色素瘤之间的联系，黑色素瘤是一种严重的皮肤癌，正是由这些细胞引起的。通过研究影响黑色素细胞的遗传和环境因素，研究人员希望开发出更有效的预防和治疗策略。总之，黑色素细胞是对我们的皮肤健康和外观具有重要贡献的细胞。它们产生黑色素的能力不仅保护我们免受有害的紫外线辐射，还在定义我们身体身份方面发挥着关键作用。随着我们继续探索黑色素细胞的复杂性，我们获得了对人类皮肤美丽和脆弱性的宝贵见解。因此，理解这些细胞不仅是生物学兴趣的问题；它对健康、美学以及与皮肤相关疾病的持续斗争具有深远的意义。