The extraglomerular mesangial cells help with the signalling between macula densa cells and juxtaglomerular cells.

外系膜细胞辅助致密旁细胞信息传递过程。

This is because the part of the occipital lobe in charge of the macula gets blood from both the posterior cerebral artery as well as the medial cerebral artery.

这是因为负责黄功能枕叶部分同时由大脑动脉大脑中动脉供血。

Then it travels through the lens, which helps to direct the light raise into the macula, which is the back part of your retina.

然它穿过晶状体，这有助于引导光线进入黄，也就是视网膜面。

So, in the case of hypovolemia and hypotension, the macula densa cells sense the low sodium and chloride levels and send a signal over to the juxtaglomerular cells which are located in the wall of the afferent arteriole.

因此，当血容量减少、低血压时，致密感受到钠、氯含量降低，传递信号给位于入小动脉血管壁上旁细胞。

Now there's a specialized region within the retina known as the macula.

现在视网膜内有一个被称为黄区域。

Is it fixing the rods, the macula, the cones, the retina?

它是在修复视网膜杆细胞、黄、视锥细胞视网膜本身吗？

The reason the Brass  Knuckles appear separate is that each macula is divided by towering uplands covered in ice.

指节铜套之所以显得分开，是因为每个黄都被冰雪覆盖高耸高地分开。

So let's go back to that analogy of the camera that we talked about and the retina being the back film and the macula the centre part affecting macular degeneration.

那么，让我们回到我们讨论相机类比，视网膜是背面薄膜，黄是影响黄变性中心部分。

It is comprised of six lowland regions, called  maculae, with an average width of 480 kilometres (each roughly the size of Iceland).

它由六个称为“” 低地区域组成，平均宽度为 480 公里（每个区域大约相当于冰岛大小）。

It's the very centre part of that, size of a pinhead or perhaps even smaller, that's the macula.

它是它中心部分，针头大小，甚至可能更小，那就是黄。

Macula densa cells are located in the distal convoluted tubule and they can sense when levels of sodium and chloride are low.

致密位于远曲小管，可以感受到钠氯水平降低。