Thyroid Physiology Flashcards
1
Q
What is the master regulator of the endocrine system?
A
Pituitary gland
2
Q
What imaging is used for thyroid scanning?
A
US scan
iodine uptake imaging
3
Q
What do Parafollicular C cells secrete?
A
Calcitonin
4
Q
What is a Thyroid Colloid?
A
A tyrosine containing thyroglobulin encolsed by follicular cells
5
Q
What are T3 and T4?
A
Tyrosine + iodine (3 on T3, 4 on T4)
6
Q
T3 is more biologically active than T4 (T/F)
A
True
7
Q
What are the main carrier protein that bind T3 and T4?
A
TBG (thyroxine binding protein)
TBPA (thyroxine binding prealbumin
Albumin
8
Q
Where does de-iodination of the thyroid hormone occur?
A
Liver, kidney, heart, skeletal muscle, CNS, fat, thyroid, pituitary, foetal tissue, placenta, brain
