That's a bad time for agitation, hyperactivity, hypervigilance, spasticity, craziness, nervousness, excitability, and trouble.

那是个不适宜、度活跃、度警觉、痉挛、疯狂、紧张、兴奋和麻烦的时间。

The effect this has on excitability of myocytes, however, is complex.

然而，这对心肌细胞兴奋性的影响是复杂的。

While initial changes seem to increase myocyte excitability; further rise of potassium has the OPPOSITE effect.

初始变化可能增心肌细胞的兴奋性，但钾进步升高却具有相反的作用。

The result is a reduced excitability or responsiveness of the neurons and muscles in the heart.

这导致心脏神经元和肌肉的兴奋性或反应性降低。

And it does give me that extra little wave of energy, but not that excitability, manic energy, where your heart rate can't calm down.

它确实能给我带来那外的能量波，但并非那种让人兴奋、近乎狂躁的能量，不会让你的心率无法平复。

This reduces the heart's excitability and suppresses reentrant tachycardia.

这降低心脏的兴奋性和抑制折返性快速性心律失常。

Now, as you may know, the binding of glutamate to the NMDA receptor results in an influx of extracellular calcium, which controls membrane excitability and synaptic transmission.

现在，如你所知，谷氨酸与NMDA受体的结合导致内流细胞外钙，控制膜的兴奋性和突触传递。