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。

And those leaves also started secreting acid fluids that could dissolve any incoming apatite, assisting phosphorus's absorption.

这些叶子也开始分泌酸性体，可以溶解任何磷灰石，帮助磷吸收。

Hot water increases the amount of fat secreted by the skin.

热水会增加皮肤分泌脂肪量。

Luteinized granulosa cells secrete inhibin, which inhibits the pituitary gland from making FSH.

黄素化颗粒细胞会分泌抑制素，抑制垂体生成FSH。

The pore is its humble abode and the waxy sebum we secrete, its meal of choice, and it's estimated that between 1.5 and 2.5 million of them live on our bodies at any one time!

毛孔是它简陋住所，我们分泌蜡质皮脂是它首选食物，据估计，每时每刻都有 150 万到 250 万个螨虫生活在我们身体上！

Your mattress was made from the ocean's softest eelgrass. Your quill pen will be whalebone, your ink a juice secreted by cuttlefish or squid.

您睡床是侮中最软和大叶海藻做。您使是鲸鱼触须，墨水是墨鱼乌贼分泌汁。

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。

Turns out our brains contain an almond-sized amygdala that secretes fight-or-flight hormones all day, and evolution has programmed our amygdalas to look for, find, and solve problems.

事实证明，我们大脑中有一个杏仁大杏仁核，整天分泌战斗逃跑激素，而我们杏仁核已经化成了为寻找、发现和解决问题存在。

Antelopes leave smells, called territorial markers, secreted in urine, or pee, to tell other animals that an area of land is already occupied.

羚羊会在尿便中释放出一种被称为" 地盘标记" 气味，告诉其他动物：这块地已经被占了。

While the human body secretes multiple enzymes to protect itself from these effects, under high pressure the production of these highly reactive species overwhelms a cell's ability to protect itself, destroying the cell.

虽然人体能分泌多种酶来保护自己免受这些影响，但在高压下，这些高反应性物质产生压倒了细胞保护自身能力，并最终摧毁。

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。

Enamel-building cells secrete a mixture of chemicals that hardens into mineral crystals.

造釉细胞分泌一种化学混合物，然后硬化变成矿物质结晶。

So progesterone is a hormone that's secreted by the placenta into the maternal bloodstream.

孕激素是一种由胎盘分泌到母体血中激素。

Both FSH and LH are secreted by the pituitary gland.

FSH 和 LH 都是由垂体分泌。

Your fight or flight response switches on, the pituitary gland secretes adrenocorticotropic hormone, cortisol is released, your heart rate shoots up, your digestion turns off and you really start moving.

此刻，我们立即了“战逃”状态，脑垂体分泌出促肾上腺皮质荷尔蒙和皮质醇，心率急剧上升，消化系统关闭，准备逃跑。

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

相反，垂体腺瘤只会增大，并分泌过多ACTH。

Medical researchers are now studying what causes fibroblast cells to secrete excessive amounts of collagen and how we can recruit the body's other cells in regenerating and repopulating the damaged tissue.

医药工作者现在正在研究是什么促使成细胞组织分泌过量胶原蛋白，还有我们身体是如何“召集”其他体细胞来重新建造被损坏组织。

Even if your fingertips are not soiled by blood, dirt, or Cheeto dust, they will still leave behind chemical imprints on things you touch because the sebaceous glands under our skin secrete a cocktail of sweat, oils, and amino acids.

即使你指尖没有被血、污垢奇多粉弄脏，它们仍然会在你接触东西上留下化学印记，因为我们皮肤下皮脂腺会分泌汗、油脂和氨基酸混合物。

If we are hiking on the top of a snowy mountain, the rising demand for oxygen from our body is met as soon as our kidney responds by secreting a type of hormone into the blood.

如果我们在雪山山顶上徒步旅行，当我们肾脏通过向血中分泌一种激素而做出反应时，我们身体对氧气不断增加需求就会得到满足。

Often referred to as the stress hormone because it's secreted in high levels during your body's' fight or flight' response, cortisol also happens to be related to your level of alertness through the day.

皮质醇通常被称为压力荷尔蒙，因为它在你身体“战斗逃跑”反应中分泌最多，而皮质醇恰好与你一整天警觉性有关。