• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

image

PLAY BUTTON

image

PLAY BUTTON

image

Progress

1/11

Click to flip

Card Range To Study

through

11 Cards in this Set

  • Front
  • Back
What tests are employed to determine thyroid function?
1. Serum thyroxin
2. Resin T3 uptake(RTU)
3. Thyroxin uptake(TU)
4. Free thyroxin index(FTI)
5.TSH(Thyroid stimulating hormone)
What does serum T4 measure?
It measures the total T4, which includes T4, bound to thyroid binding globulin(TBG) and Free T4.
What may cause increased total serum T4 levels?
These levels can be increased from, increased free T4, such as Grave's disease, or from increased TBG.
What does the RTU measure?
The resin T3 uptake essentially measures the TBG concentration by measuring the binding of radioactive T3 to TBG. the same thing is determined using the thyroxin uptake (TU). These values can be used to artificially determine the free thyroxine index (FTI), which is an estimate of the free thyroxin.
The FTI (T7) can be determined using either T4 times TU or T4 times T3U. TRUE/FALSE
TRUE.
If a person is euthyroid, then their free T4 will be within normal limits. TRUE/FALSE
TRUE.If the TBG in this person is normal, then the serum T4 will also be normal, but if their TBG is increased, then the total serum T4 will be increased.
What external factors might increase as well the TBG?
Increased estrogen from birth control pills or pregnancy.
Because the TBG is increased, the resin triiodothyronine uptake will be decreased> TRUE/FALSE
TRUE. If an individual is euthyroid and his free T4 is normal, then his TSH will also be normal.
The measurement of serum TSH levels is the best test to determine if thyroid function is normal or abnormal. True/False
True.
What does a normal TSH level indicate?
This indicates that free T3 and Free T4 levels in the serum are normal.
Increased serum TSH indicates what?
It indicates a low free T3 and a low Free T4. This is primary hypothyroidism. Decreased serum TSH levels indicate either decreased production by the pituitary(hypopiuitarism) or increased thyroid production by the thyroid gland (hyperthyroidism).