IT DIT甲状腺胶质 T MIT DIT Tyr MIT T3 Ta T yI DIT Tyr 胶质小滴 溶酶体 s吞噬溶酶体 條 球蛋 MIT TG DIT T 碘泵 TO T T4
·T3andT4 Meta bolic potency of t3 is 3-4 times that of T4. Only 20% of circulating t3 is secreted by the thyroid 3. T4 in circulation Binding form: 70% with TBG, other with alb Free form: T40.03%. T30.3%0
• T3 and T4 • Metabolic potency of T3 is 3~4 times that of T4. Only 20% of circulating T3 is secreted by the thyroid • T3, T4 in circulation Binding form：70％with TBG ，other with Alb. Free form：T4 0.03%, T3 0.3%
Hypothalamus TRH Anterior pituitary gland TSHT Thyroid gland r3 3 4 Hypothylamic-pitutary-thyroid feed back regulation
TRH TSH - Hypothalamus Anterior pituitary gland Thyroid gland rT3 T3 T4 Hypothylamic-pitutary-thyroid feedback regulation