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Negative feedback of thyroid H. - pass123

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Negative feedback of thyroid H. - pass123
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#1
04-04-2007, 07:27 AM
Negative feedback of thyroid H. is due to
1. Free T4
2. Free T3
3. Bound T4
4. Boud T3
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#2
04-04-2007, 07:46 AM
2....
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#3
04-04-2007, 08:36 AM
11111111
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#4
04-04-2007, 08:51 AM
FA and UW: say free T3
Kaplan says: free T4...so it is a big confusion here
I will go with free T3
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#5
04-04-2007, 09:34 AM
the negative feedback at the pituitary anterior lobe is principally through T4 taken from the circulation and converted in the thyrotrope to T3 by thyrotrope deiodinase
?????
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#6
04-04-2007, 11:01 AM
Hi Ulise,
This is reason posted here for discussion!
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#7
04-04-2007, 11:09 AM
i would like to state that under physiological conditions T4 gives negative feeback,but in hyperthyroid conditions when T4 ,T3 is elevated T3 acts as negative controller...that is what i inferred after reading the UW explanation for negative feedback??
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