As an English teacher, I would explain 'APUD' from at least five aspects as follows:
1. Meaning: APUD is an abbreviation for “amine precursor uptake and decarboxylation,” which refers to a type of cell that is involved in the regulation of various hormones and neurotransmitters in the body.
2. Origin: The term "APUD" was first introduced by Pearse in 1968 as a group of neuroendocrine cells that originated from the embryonic neural crest.
3. Functions: APUD cells are involved in the regulation of various hormones and neurotransmitters in the body, including insulin, glucagon, serotonin, and catecholamines.
4. Research: APUD cells have been found to play a role in the development of certain cancers, such as small cell lung cancer and neuroendocrine tumors.
5. Significance: The study of APUD cells is important in understanding the regulation of hormonal and neurochemical processes in the body and can help in the development of new treatments for certain diseases.
Example sentences:
1. The APUD system regulates the production of insulin in the body.
APUD系统调节体内胰岛素的产生。
2. Studies have shown that APUD cells are involved in the development of neuroendocrine tumors.
研究表明，APUD细胞参与了神经内分泌肿瘤的发展。
3. The discovery of APUD cells has led to advances in our understanding of hormonal regulation in the body.
APUD细胞的发现推动了我们对身体内部激素调节的认识。
4. APUD cells have been found to play a role in the development of certain types of cancer, including small cell lung cancer.
APUD细胞已经被发现在某些癌症，包括小细胞肺癌的发展中扮演了重要的角色。
5. Research into APUD cells may lead to the development of new treatments for diseases such as diabetes and neuroendocrine tumors.
对APUD细胞的研究可能会为糖尿病和神经内分泌肿瘤等疾病的治疗带来新的进展。
apud是拉丁语中的介词，意为“在……旁边/在……之中”。在现代英语中，它可用于指在某一地点的附近或在某一人的身边。
读音：[ah-pood]
例句：
1. Apud me, you will always find a warm welcome. (在我这里，你永远都会受到热情的欢迎。)
2. Apud Romanos, familia est primordialis. (在罗马，家庭是至高无上的。)
3. Apud medicum consultandum est. (你应该到医生那里进行咨询。)
apud在中文中有"内分泌细胞系统、内分泌细胞"的意思，在英美地区还有"摄胺脱羧细胞"的意思，在线发音：[apud]，apud在英语中经常以名词形式出现，在《荷林斯高阶英汉词典》中，共找到40个与apud相关的例句。
Apud的词典翻译
1.内分泌细胞系统
例句:These neoplasms are derived from the thyroid "C" cells and, therefore, have neuroendocrine features such as secretion of calcitonin. (此肿瘤来源于甲状腺C细胞，因此具有神经内分泌方面的特征，属APUD瘤，例如分泌降钙素。)
2.内分泌细胞
3.摄胺脱羧细胞
4.胺前体摄取及脱羧、摄胺脱羧细胞
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