00:01
Which of these is an example of positive feedback.
00:04
So we've got positive feedback and negative feedback.
00:10
Now positive feedback is quite rare in the body.
00:13
Negative feedback is a lot more common.
00:16
Let's look at why.
00:19
So negative feedback is you have a baseline.
00:22
Something happens to take you away from that.
00:24
Your response is to go back to normal.
00:28
You get too hot.
00:30
You sweat more, you lose some heat, you cool off.
00:33
That's negative feedback.
00:36
So if we look at a, body shivers because it's too cold.
00:39
Shivering increases temperature.
00:41
That's negative feedback.
00:43
You try to minimize the change that has happened.
00:46
You go back to normal.
00:48
Positive feedback.
00:50
You have your baseline.
00:51
You go away from baseline.
00:53
And your response is, actually, let's go further away from baseline.
00:56
Let's keep going...