Endocronilogy ii

Question 1

most important element in the biosynthesis of thyroid hormones

a. hemoglobin
b, calcium
c, iodine
d. nota

Answer 1

iodine

Question 2

most potent

a. t3
b. t4

Answer 2

T3 - most potent
( T4is converted to T3 suggesting that T3 is more important)
- most active thyroid hormone activity

Question 3

which of the ff is thyroid autoantibody responsible for autoimmune thyroid disorders

a. TPO
b. TG
c. TR
d. aota

Answer 3

answer : aota

thyroid autoantibody responsible for autoimmune thyroid disorders

1. Thyroproxidase (TPO)
2. thyroglobulin (TG)
3. TSH receptor (TR)

Question 4

the principal application of ______ is in diagnosis of T3 thyrotoxicosis

a. Triiodothyroxine
b. tetraiodothyroxine

Answer 4

triiodothyroxine (T3)

- diagnosis of T3 thyrotoxicosis

Question 5

better indicator for recovery from hyperthyroidism

a. Triiodothyroxine
b. tetraiodothyroxine

Answer 5

triiodothyroxine (T3)
- diagnosis of T3 thyrotoxicosis
- better indicator for RECOVERY from hyperthyroidism
as well as RECOGNITION OF RECURRENCE of hyperthyroidism

Question 6

best indicator for thyroid status

a. FT3
b. FT4
c. TSH
d. TRH

Answer 6

Free T4 and TSH
- best indicator for thyroid STATUS

FT3 and T4
- more specific indicator of thyroid FUNCTION

Question 7

test for residual or recurrence of disease

a. T3 uptake test
b. fine needle aspiration
c. recombinant human tsh
d. FT4

Answer 7

Recombinant human TSH
- check for the residual or recurrence of disease

fine needle aspiration
- most accurate tool in evaluation of thyroid disorders

t3 uptake
- measure the number of available BINDING SITES

Free thyroxine index
- INDIRECTLY assess the level of Ft4