水平细胞(horizontal cell)是多极神经元的一种。因其纤维走向水平而得名。多见于中枢神经系统中的中间神经元和视网膜中。在视网膜中,存在于视锥细胞和视杆细胞之间的水平细胞粗短树突同邻近的视杆细胞与视锥细胞,或者视锥细胞与视杆细胞构成突触,而较长的轴突则同视杆细胞连接,使感光细胞间形成横向联系,具有整合各种刺激的作用。
研究小组发现这些鱼的水平细胞对光线的敏感度比它们的同伴锥细胞弱数千倍。
The team found that these fish horizontal cells are thousands of times less light sensitive than their partner cone cells.
关于水平细胞的感光性如何参与视觉成像,还需要对视网膜而非单个细胞进行更多研究。
Learning more about how the light sensitivity of horizontal cells contributes to image vision will require studying whole retinas, not just single cells.
研究小组对单个视网膜水平细胞进行了电子扫描,发现光引起了锥状细胞中电流的变化,而在柱状细胞中则无此反应。
The team took electrical readings from single isolated retinal horizontal cells. They found that light caused a change in electrical current in cone horizontal cells but not in rod horizontal cells.
I want to look at a slightly higher level of magnification now and think about different kinds of cellular communication.
我现在想讲一些较高水平的放大机制,并思考不同种类的细胞通讯
So, there are cells in your pancreas which recognize glucose levels and they secrete insulin in response.
你的胰腺细胞能够,识别血糖水平,并分泌胰岛素作为反馈
We can even understand it on a molecular or cellular level now.
如今我们已经能从,分子和细胞水平对机体进行研究
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