来自《耶鲁大学开放课程：生物医学工程探索 第15集 第15集》

• 
  
  You're standing there in the resting state,
  静息状态下 你站在膜上
• 
  
  so you're watching sodium and potassium go by
  你看着钠钾离子以常规流量
• 
  
  because of their normal fluxes,
  进进出出
• 
  
  and the potential that you measure is,say -75 mV.
  当你检测到电压变为 -75 mV时
• 
  
  Now,something happens,
  事情就发生了
• 
  
  there's some disturbance in the membrane near you,
  你附近的细胞膜发生电扩布
• 
  
  not right where you're standing but near you there's a disturbance.
  不是你站的地方 而是你站的地方周围发生电扩布
• 
  
  That disturbance might be a number of events
  电扩布意味着一系列事情发生
• 
  
  but what we've thought about so far is that
  但现在 我们想到的是
• 
  
  there's a neurotransmitter that binds.
  有一种神经递质的结合
• 
  
  Somewhere upstream of you there's a neurotransmitter that binds
  上游某处有一种神经递质
• 
  
  to a receptor and it creates a change in membrane potential.
  和受体结合 导致了膜电位的变化