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cleavage T4 and T3 break from colloid stim by TSH. secretion exocytosis. transport TBG thyroxine-binding globulin. control of T4. stimulus: TSH (thyroid stimulating hormone) low blood T4. low body temp. pregnancy. inhibited by any inhibition of TSH. high blood T4. somatostatin. Diseases of Thyroid hormone. Grave’s Disease hyperthyroidism ................
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