thyroid hormone

Question 1

hypothalamus produces

Answer 1

Thyrotropin-releasing hormones

Question 2

pituitary secretes

Answer 2

Thyroid Stimulating Hormone

Question 3

Thyroid gland produces

Answer 3

Thyroxine

Question 4

largest endocrine gland

Answer 4

thyroid hormone

Question 5

calcitonin is secreted by____ cells

Answer 5

parafollicular C cells

Question 6

calcitonin inhibits _____ and prmotes ______

Answer 6

ihibits bone resoprtion, promotes bone formation

Question 7

calcitonin is secreted when _____ rises

Answer 7

blood calcium

Question 8

Thyroid hormone functions

Answer 8

regulate body metabolism, neurologic development, tissue growth, sexual maturation

Question 9

colloid is rich in ______ and is main storage site of ______

Answer 9

thyroglobulin, thyroid hormones

Question 10

formation of thyroid hormones

Answer 10

1. follicular cell synthesizes enzymes and thyroglobulin
2. 1-is co-transported into cell with Na+
3. Enzyme (TPO) adds iodine to thyroglobulin making MIT/DIT residues to form T3 and T4
4. When stimulated by TSH, thyroglobulin is taken back into cell
5. Enzymes separate T3 and T4 from protein
6. Free T3/T4 enter circulation

Question 11

amino acid derived hormone from tyrosine

Answer 11

T4 aka Thyroxine

Question 12

T4 is a precursor to

Answer 12

T3

Question 13

T4 reference range

Answer 13

Males: 4.6-10.5 ug/dL
Females: 5.5-11.0 ug/dL

Question 14

Most active thyroid hormone

Answer 14

T3

Question 15

T3 is affected by variations in _____

Answer 15

thyroxine binding globulin (TBG)