Melatonin is a hormone secreted by the brain, and is critical in regulating your sleep.

褪黑激素是种大脑分泌用来调节睡眠程度荷尔蒙。

When you eat and your blood sugar rises, insulin is secreted into the blood.

当你吃东西导致血糖升高时候，胰岛素被分泌到血液中。

These club cells secrete glycosaminoglycans which protect the bronchiolar epithelium.

棒状细胞能分泌糖胺聚糖，来保护细支气管内膜。

And tiny bacteria will have trouble secreting the larger spidroin proteins.

而微小细菌难以分泌出大蛛丝蛋白。

One of the most important is leptin, a hormone secreted by your fat cells.

其中最重要是瘦素，一种由脂肪细胞分泌激素。

Instead, the pituitary adenoma simply grows in size and secretes too much ACTH.

相反，垂体腺瘤只增大，并分泌过多ACTH。

The only difference is they secrete their own scents from glands near their wrists.

唯一区别是，它们从胸部附近腺体分泌自己气味。

Pearls contain a mixture of protein and calcium carbonate secreted by certain types of molluscs.

珍珠是某些软体动物分泌碳酸钙同蛋白质一起构成混合物。

However, since it lacks actual sugar, there is nothing for the secreted insulin to metabolize.

然而，由于它没有糖，那么人体分泌出来胰岛素就没有东西可以用来代谢。

Malassezia eat sebum by secreting an enzyme that releases all of the oil's fatty acids.

马拉色菌分泌一种酶，分解皮脂中所有脂肪酸。

But not all saliva is secreted equal, we pump out two different brands of mouth juice.

但并非所有唾液分泌都是一样，我们产生两种不同品牌“口水汁”。

Instead, your small intestines, with the aid of bile secreted by your liver, break it down.

而是你小肠，借著你肝脏分泌胆汁分解油脂。

So when you eat, insulin is secreted by the pancreas to move sugar into the cells.

当你们吃了东西，胰脏分泌胰岛素，将糖搬进你细胞里。

And then, there’s chief cells, which secrete an enzyme called pepsinogen.

然后，主细胞分泌一种叫做胃蛋白酶原酶。

To build bone, osteoblasts secrete osteoid, which is an organic matrix made of type 1 collagen.

在构建骨过程中，成骨细胞分泌骨质，它是一种由1胶原组成有机质。

This amazing structure is created by two types of cells: ameloblasts that secrete enamel and odontoblasts that secrete dentin.

分泌牙釉成釉细胞以及分泌牙本质成牙本质细胞。

When the hepatocytes are injured though, they secrete paracrine factors that “activates” and changes the stellate cells.

然而，当肝细胞受损时，肝细胞分泌“旁分泌因子”，可以激活并改变星形细胞。

When hookworms sink their teeth into the intestinal wall, they secrete chemicals that blunt the immune system.

当十二指肠虫将牙齿嵌到肠壁，它们分泌化学物质使得免疫统迟钝。

As the larva matures, special microbes in the paste secrete antibiotics to keep the nest free of infections.

当幼虫成熟时，糊状物中特殊微生物分泌抗生素，以保持巢穴不受感染。

Now, a new study in mice shows how a hormone secreted by active muscle cells triggers bone remodeling.

现在，一项在老鼠身上进行新研究揭示了活跃肌肉细胞分泌激素是如何触发骨骼重塑。