00:01
The curve of the action potential and the duration.
00:06
So it is the potential in windle volts and it is the time in millisecond.
00:12
So what will happen? resting membrane potential is minus 70molts.
00:17
So let us say we are applying a stimulus and when it is reaching the threshold, which is minus 50.
00:24
So when the level reaches the threshold, a depolarization occurred due to the n8 channel opening.
00:31
But soon the sodium channel closes and k -positive channel opens.
00:37
And this is called the repolarization.
00:40
And sometimes prolonged opening of the k -positive channel will lead to the hyper -polarization.
00:46
So this prolonged opening state is called the hyper -polarization.
00:51
So whenever in the cardiac tissue, the amount of k -positive is kept on increasing, very high.
01:03
So whenever a very high k positive is increased, it will lead to the, what we can say, decrease in the action potential below minus 70.
01:15
So whenever action potential moves below minus 70, this state is it is called as the hyper polarization...