4.2.3.2 Major Hormones (Thyroid Gland, Lab diagnosis) Flashcards
Most important test of thyroid function
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
a
Relative estimate of free T4 concentration; product if TT4 and THBR
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
d
Reflects the quantity of TBG (Thyroxine binding globulin) present and the number of hormones bound to it
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
c
Inversely proportional to TBG
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
c
1st test for screening, if normal, no further testing
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
a
Biologically active form of T4
FT4
requires separation of the hormone form its carrier protein using equilibrium dialysis
a. TSH
b. T4
c. T3 uptake (T3U)
d. Free T4 index (FTI)
b
Usually only tested when TSH is low and FT4 is normal
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
a
Is TSH is low ad FT4 is normal, it may be indicative for ?
a. Graves disease
b. Hashimotos disease
c. T3 thyrotoxicosis
c
Thyroid-stimulating antibodies that mimic the action of TSH
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
d
Measures thyroidal uptake of iodine after an oral dose of I131
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
b
Detected as thyroid microsomal antibodies using agglutination of immunofluorescence
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
c
Very sensitive marker for Hashimoto’s thyroiditis
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
c
Positive 85% of patients with Grave’s Disease
a. T3
b. RAIU
c. Anti-TPO
d. TRAb/TSHRAb
d
TSH: Decrease
Free T4: Increase
TT4/TT3: Increase
T3U: Increase
a. Primary hyperthyroidism
b. Primary hypothyroidism
c. Secondary hyperthyroidism
d. Secondary hypothyroidism
a
TSH: Increase
Free T4: Increase
TT4/TT3: Increase
T3U: Increase
a. Primary hyperthyroidism
b. Primary hypothyroidism
c. Secondary hyperthyroidism
d. Secondary hypothyroidism
c
TSH: Decrease
Free T4: Decrease
TT4/TT3: Decrease
T3U: Decrease
a. Primary hyperthyroidism
b. Primary hypothyroidism
c. Secondary hyperthyroidism
d. Secondary hypothyroidism
d
TSH: Increase
Free T4: Decrease
TT4/TT3: Decrease
T3U: Decrease
a. Primary hyperthyroidism
b. Primary hypothyroidism
c. Secondary hyperthyroidism
d. Secondary hypothyroidism
b
TSH: Normal
Free T4: Normal
TT4/TT3: Increase
T3U: Decrease
a. Euthyroid, Increase TBG
b. Euthyroid, Decrease TBG
a
TSH: Normal
Free T4: Normal
TT4/TT3: Decrease
T3U: Increase
a. Euthyroid, Increase TBG
b. Euthyroid, Decrease TBG
b
TBG affects TT4/TT3 directly proportional while in T3U it is inversely proportional
T or F
T
