00:02
Okay, so the negative feedback is actually pretty important when it comes to hormones.
00:07
And what it's going to do is sense that there is too much or too little of something, and then the body is going to regulate that, so then there is a normal concentration of those hormones.
00:18
So, for example, let's talk about the thyroid, and we're going to be talking about trh, t -sh, and then t -3 and t -4.
00:26
So let's say that there is way too much t3 and t4 in the blood.
00:34
The hypothalamus is going to sense that, and it's going to say, okay, we need way less t3 and t4 in the blood.
00:42
So then it's going to cause a decrease in the amount of trih, which is thyroid -releasing hormone.
00:49
Well, the anterior pituitary responds to trih to produce t -sh, so when there's a decrease, amount of trh, the anterior pituitary, is now going to secrete less t .s .h, which is thyroid -stimulating hormone...