Answers to Review Questions in Thyroid Function and Abnormalities

1.    How are T3 and T4 formed?

T3 is formed from the combination of 1 diidothyronine and 1 monoiodothyronine, while T4 is formed by the combination of 2 diiodothyronine molecules.

2.    What's more biologically active between T3 and T4?

Although total T4 is more elevated in the blood stream, T3 is more biologically active because it has more free forms than T3. The free forms are responsible for the activity of the hormone in the body.

3.    What would be a more reliable test between T3 and T4 to test Thyroid Function?

Both can be performed, including TSH to determine thyroid function.

4.    What other tests can be performed for TFT (Thyroid Function Test)?

TSH test and T3 uptake test. Also, FT3, FT4.

5.    What abnormalities can result from insufficient or elevated T3 and T4?

Hyperthyroidism – elevated T3 and T4; decreased TSH
Hypothyroidism – low T3 and T4; increased TSH

REVIEW QUESTIONS: For HCG Testing

REVIEW QUESTIONS: For HCG Testing

1.    In the quantitative test, why is there a need to test a 24 hr. urine specimen?

2.    How can you detoxify urine in patient's preparation for HCG determination?

3.    What are the causes of false positive and false negative results?

4.    What normal condition gives positive results to HCG?

5.    In the quantitative determination of HCG why do you have to prepare serial dilution of the urine samples.

ANSWERS WILL BE POSTED NEXT WEEK,

Review on Thyroid Gland and Abnormalities Slide Show

The thyroid gland is found at the neck portion of the human body. It is the major metabolic gland because it secretes the primary metabolic hormones, T3 and T4. Without Triidothyronine and Thyroxine, your body won't be able to develop properly. See if you can answer these questions first, before proceeding to the slides.Write your answers on a sheet of paper, so you can check them later.

Review Questions in Thyroid Function and Abnormalities

1. How are T3 and T4 formed?
2. What's more biologically active between T3 and T4?
3. What would be a more reliable test between T3 and T4 to test Thyroid Function?
4. What other tests can be performed for TFT (Thyroid Function Test)?
5. What abnormalities can result from insufficient or elevated T3 and T4?

 Now, Let's see if your answers are correct. Check here for the answers to Thyroid Function Test

Answers will be posted next week.