Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
What do thyroid hormones do?
|
Iodine-containing hormones that control the bodies metabolic rate
|
|
Where is T3 created?
|
Follicles of the Thyroid
|
|
Where is T4 created?
|
Formed in target tissues from conversion of T3
|
|
What are the 4 functions of the Thyroid hormones (4 B's)?
|
Bone growth
Brain (CNS) maturation increase B1 receptors of the heart (increase CO, HR, SV, contractility) increase in BMR (inc in glycogenolysis, gluconeogenesis, lipolysis) |
|
Which hormone stimulates TSH?
|
TRH
|
|
What binds most of the T3/T4 in the blood?
|
Thyroxine-binding globulin
|
|
What provides negative feedback to the anterior pituitary to decrease sensitivity to TRH?
|
Free T3
|
|
Which binds with more affinity, T3 or T4?
|
T3
|
|
What is the Wolff-Chaikoff effect?
|
Excess iodine temporarily inhibits thyroid peroxidase = decrease iodine organification = decrease T3/T4 production
|