Thyroid Metabolism

Question 1

Thyroid hormones are excreted majorly by …….. And rearly by…..

Answer 1

Bile in the liver
Urine

Question 2

T4 ( prehormone) is converted to T3 and RT3 in what percentages or fraction?

Answer 2

1/3rd to T3
45℅to RT3

Question 3

In what percentages are the T3s and RT3s in circulation secreted by the thyroid and formed from T4 in peripheral tissues

Answer 3

T3-13% in T 87% in Tissues
RT3-5% in T and 95% in Tissues