adenohypophysis Flashcards
0
Q
product of iodine thyroglobulin rxn
A
MIT monoiodootyrosine and DIT diiodotyrosine
1
Q
What enzyme synthesizes the attachment of iodine to tyrosine of thyroglobulin (TGB)?
A
thyroid peroxidase
2
Q
What is T3 triiodothyronine composed of
A
MIT and DIT (monoiodotyrosine and triiodotyrosine)
3
Q
What is T4 thyroxine composed of
A
2 DIT’s
4
Q
What must happen for T3 and T4 to be transported out of the colloid
A
must be cleaved from thyroglobulin (TGB)
5
Q
When is T4 converted to T3
A
at the target tissue
6
Q
TH is anabolic or catabolic
A
anabolic (calorigenic, exothermic)
7
Q
what are basal metabolic conditions
A
awake resting and fasting
8
Q
what is the relationship between thyroid hormone and catecholamines
A
TH has a permissive effect on catecholamines. up-regulation of beta receptors on heart.
