00:01
In this question we have an ion channel that carries 2 .4 pico ampere when it's open.
00:14
The current is 2 .4 pico ampere when it's open, but it opens 20 % of the time.
00:25
So we want to find the average current and when it's open for 1 milliseconds and we want to calculate the number of singly charge ions that pass through the channel.
00:35
Okay, so solution.
00:40
So in part a, you want to calculate the average current since it's open, it opens 20 % of the time.
00:47
So average current, okay, so you'll be 1 over 5 times 2 .4 times 10 to the negative 12.
01:03
Okay, yeah, because it opens five times, but the total amount of current is just 2 .4 picoampeakure like let's say it opens five times only one time that there will be current that flow true and then and on average each time when the channel opens it allows 0 .4 8 pico ampiers to of current to flow true okay so that's the average current okay then in part b when it opens for 1 milliseconds, we want to calculate the number of singly charge ions that pass true.
01:47
So first we calculate the amount of charge...