Release of Thyroid hormones
Hypothalamus
Chudren Cold exposure
-ve
Feedback
TRH
anterior Pitutanf
-ve
Fred back
TSH
thyroid d gland
↑ storage by pinocytosis ↑ lysosomes activation to release T-T4
T-T4
Note:
1. Thiocyanate/Perchlorate ions
2. Propyl thio uracil
3. high Conc of iodide
4. Cabbage
} anti thyroid Substances.