10 Questions
What percentage of iodine in the body is in the form of T4?
95%
What is the main transport protein of thyroid hormones in the blood?
Thyroid-binding globulin (TBG)
What is the half-life of T4 in individuals with hypothyroidism?
9-10 days
What is the recommended daily intake of iodine for pregnant women?
220 ug
What is the effect of cold stress on T3 and T4 synthesis?
Increases T3 and T4 synthesis by 100%
What is the mechanism of action of thyroid hormones at the cellular level?
Influence of gene transcription
What is the role of TRH in the regulation of thyroid hormone synthesis?
Stimulates the release of TSH from the adenohypophysis
What is the effect of TSH on thyroid hormone synthesis?
Stimulates thyroid hormone synthesis at various stages
What is the percentage of unbound T3 in plasma?
0.3%
What is the fate of T3 and T4 in the liver?
They are conjugated with glucuronic acids and sulphur-containing acids
Test your knowledge of the thyroid gland, its hormones, and their functions. Learn about the physiology and pharmacology of the thyroid gland, including the production of T3 and T4 hormones. Understand the role of calcitonin and its impact on metabolism.
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