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Flashcards in Christie Deck (47)
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1

Triiodothyronine (T3)

  • 10% of Thyroid Hormone secretion
  • Active Form

2

What is the active form of Thyroid Hormone

T3

3

The parafollicular or C cells of the thyroid secrete

Calcitonin

4

Which of the following statements about T3 and Tis true

Use transport sytems to cross cell membranes

5

What reaction does thyroid peroxides catalyze

  • oxidation of iodide ion to I2
  • organification of I2 into thyroglobulin
  • coupling reactions

6

What inhibits thyroid peroxidase

propylthiouracil 

7

What molecule transports the majority of thyroid hormones in the blood

Thyroid binding globulin

8

When you suspect hyperthyroidism in a patient, what is the first test you should order.

TSH

9

What is a effect of thyroid hormone

Increases the basal metabolic rate

10

Iodide balance in the body

Most of the iodide in the thyroid is stored as thyroglobulin

11

Thyroid function tests are used for:

  • assess overall thyroid status
  • evaluate the adequacy of levothyroxine therapy
  • monitor the treatment of:
    • hyperthyroidism
    • hypothyroidism

12

Not an indication for performing thyroid function testing?

Monitor the treatment of hypothyroidism

13

What does not inhibit thyroid hormone function?

Increased TBG levels

14

T or F: "Cold" thyroid nodules are most likely to be neoplastic than are "hot" nodules.

true

15

Based on your present knowledge, what causes the abnormality shown here

Thyroglossal duct cyst

16

2 year old child

Thyroxine

17

What causes the condition seen in this infant?

Hypothyroidism

18

Goiter

  • Plummers syndrome is due to autonomous nodule in a multinodular goiter

19

In this euthyroid individiual who is otherwise asymptomatic, which of the following is the most likely diagnosis for this lesion?

simple (diffuse) goiter

20

What are autoimmune diseases?

Graves disease

Hashimoto's thyroiditis

21

35 year old lady

Graves Disease

22

50 year old lady

Hasimotos disease

23

Thyroid cancer

Cancers metastatic to the thyroid are common

24

Which of the following neoplasms is most likely to metastasize to the thyroid gland?

renal cell carcinoma

25

Which of the following thyroid neoplasms has the worst prognosis?

anaplastic carcinoma

26

Which of the following thyroid carcinomas is most likely to stain for amyloid?

Medullary Carcinoma

27

Not a feature of multiple endocrine neoplasia?

Same age at diagnosis as sporadic cancers

28

Which cells secrete PTH.

Chief Cells

29

What cells form bone

osteoblasts

30

What is the abnormality shown here

Parathyroid adenoma