Homeostatic Imbalances of Thyroid Function
TSH levels in patients with primary hypothyroidism are high Thyroxine (T4) levels in patients with primary hypothyroidism are low TSH levels in patients with secondary hypothyroidism are low Thyroxine (T4) levels in patients with secondary hypothyroidism are low TSH levels in patients with hyperthyroidism are low Thyroxine (T4) levels in patients with hyperthyroidism are high Materials and Methods
1. Name the Dependent Variable. blood levels of TSH and thyroxine and accumulation of radioactive iodine in thyroid
2. Name the Independent Variable. thyroid activity
3. Name the Controlled Variables. gender, age
4. Why was RIA used to measure Thyroxine while IRMA was used to measure TSH?
IRMA is more sensitive than an RIA and is needed to measure the small changes in TSH.
5. How was it used to observe relative amount of iodine accumulated by thyroid gland?
Thyroid imaging was used to observe relative amount of iodine accumulated by thyroid gland
Table 2. Concentration of Thyroxine and Thyroid Stimulating Hormone (TSH) in Blood Serum
Type of thyroid disorder 0.05-0.14
1. The normal range for total amount of Thyroxine in serum is 0.05 - 0.14 mg/L. For each patient, type in their serum Thyroxine concentration and indicate if it is lower, within, or higher than the normal range.
a. Patient with primary hypothyroidism lower Laboratory Report/ Theres Castle/ Homeostatic Imbalances of Thyroid Function/ Virgil Stoia/ 10.20.2014/ Page  of 
b. Patient with secondary hypothyroidism