00:01
Hi, to understand or answer this question we need to understand the h -p -t hormonal axis.
00:09
So for h it means hypothalamus.
00:13
Hypo -thalamus.
00:16
Hypothalamus secretes the hormone trh or thiodotropine releasing hormone.
00:25
And this hormone works on pituitary.
00:29
So pituitary is the master gland we know that.
00:32
Pituitary.
00:34
Then pituitary releases another hormone known as the thyroid stimulating hormone or t -s -h.
00:43
So this gives or stimulates the thyroid gland, okay? thyroid gland.
00:54
And then thyroid gland releases the thyroid hormones or the t -3 and t -4 hormones, which are together known as thyroid hormones.
01:10
Okay.
01:11
Now let us just answer the questions.
01:13
So when t3 and t4, when thyroid gland is overactive, what happens? it produces more of t3 and t4.
01:23
And it can be, it gives a feedback to the pituitary.
01:28
This is sensed by pituitary.
01:30
So what does it do? it reduces the t -s -h and that's how the thyroid.
01:36
The thyroid is subsequently affected.
01:47
So this is what the doctor is explaining and accordingly a drug has been given.
01:52
Now let us just answer the questions.
01:54
So question number four.
01:57
It says about the high range of hormones.
02:01
So the hormones which are in high range are t3 and t4 or the thyroid hormones and the thyroid hormones are produced by thyroid gland.
02:12
So the next answer is thyroid gland.
02:17
Now the next question is which hormone is considered to be low? when the doctor is explaining, he is actually saying that tsa level is low...