And this eventually returns our membrane back to the resting membrane potential of around negative 70 millivolts. So, everything we just discussed so far basically is summarized in the following graph. So let's suppose the y axis is our voltage given in millivolts, and the x axis is time. So basically what happens is this is the resting membrane potential of about negative 70 millivolts. This is our threshold value of about negative 45 millivolts. Now, if we apply stimulus onto the membrane of the neuron at the exxon hillock, and if the stimulus is equal to or exceeds this threshold value, then that will cause, that will signal the sodium voltage gated channels to actually open up.