Flashcards in Thyroid Physiology Deck (13)
List the main thyroid hormones
What chemical is the main "fuel source" of the thyroid?
What happens to iodine once it is taken up by the follicle cells of the thyroid?
Combines with tyrosine residues on thyroglobulin to form MIT or DIT
Outline the composition of T3
MIT + DIT
Outline the composition of T4
DIT + DIT
T3 is the more abundant thyroid hormone. True/False?
T4 makes up 90% of thyroid hormones
Is T3 or T4 more biologically active?
T4 is converted to T3 by liver/kidney. True/False?
The unbound form of thyroid hormone is biologically inactive. True/False?
Unbound is active!
What are the 2 main types of cell found in the thyroid?
Parafollicular C cells
What is stored in the colloid of the thyroid?
What do follicular cells secrete?