NK cells kill their target cells by releasing cytotoxic granules in their cytoplasm directly into the target cell.

NK胞通释放胞质内的胞毒颗粒直接进入胞内，来杀死胞。

So how do hormones bind to their target cells?

那么激素是如何胞结合的呢？

So target cells for those kinds of hormones have receptors for them on the outside of their membranes.

所这些激素的胞在膜的外面有受体。

Like steroids, thyroid hormone is lipid-soluble, so it crosses the membrane of its target cell to bind inside the nucleus.

像类固醇一样，甲状腺激素是脂溶性的，所它穿胞的膜胞核结合。

Since the liver cells seem to be the main cells targeted in Reye's disease, the liver becomes one of the main organs affected.

由于肝胞是瑞氏综合征的胞，所肝脏成为了主要的受累器官。

Hormones activate target cells by one of two methods, depending upon the chemical nature of the hormone.

根据激素的化学性质，激素通两种方法之一激活胞。

Lipid-soluble hormones (steroid hormones and hormones of the thyroid gland) diffuse through the cell membranes of target cells.

脂溶性激素(类固醇激素和甲状腺激素)经扩散通胞的胞膜。

A hormone is a chemical messenger produced by a cell that effects specific change in the cellular activity of target cells.

激素是胞产生的一种化学信使，它能引起胞活动的特定变化。

Lipid-soluble hormones, on the other hand, can just basically glide right through that cell membrane, so their receptor sites are inside their target cells.

另一方面，脂溶性荷尔蒙可直接穿胞膜，所它们的受体位于胞内。

The target cells and their receptors also move around, so the researchers think the fibers' movement could increase the chance that they'll collide with a receptor.

由于胞和它们的受体也在运动，因此研究人员认为纤维的运动可能会增加它们受体结合的机会。

Because of the specificity of hormone and target cell, the effects produced by a single hormone may vary among different kinds of target cells.

由于激素和胞的特异性，单一激素对不同类型胞产生的作用可能不同。

So, just like some keys can open many locks, while others only work with one, so too can the hormone-target-cell relationship either be widespread or localized.

所，就像一些钥匙可打开许多锁，而另一些钥匙只能用一把锁一样，激素-胞的关系也可是广泛的或局部的。

The CRH makes the very short trip through the bloodstream to the anterior pituitary gland, where, because it's water soluble, it binds to receptors on the outside of its target cells.

CRH 通血液很短的行程到达垂体前叶，在那里，因为它是水溶性的，它胞外部的受体结合。

Either way, when a target cell is activated, the hormone alters its activity, by either increasing or decreasing some of its functions — usually with the goal of maintaining your body's homeostasis in one way or another.

不管怎样，当一个胞被激活时，激素就会改变它的活性，通增加或减少它的一些功能——通常目的是这样或那样的方式维持你身体的体内平衡。

These granules contain some molecules that punch holes in the target cell's membrane by binding by binding directly to the phospholipids and creating pores. and some that cause target cells to undergo apoptosis, which is a programmed cell death.

这些颗粒内含一些能在胞膜上打孔的分子，它们直接磷脂结合，然后穿孔；还有一些能够导致胞凋亡，即程序性胞死亡。