University of Illinois, Chicago

NURS 531

Chapter 34: The thyroid

MULTIPLE CHOICE

1)The characteristics of triiodothyronine (T3) include

1. a large pool in the body
2. a low turnover rate
3. formed from thyroxine (T4) intracellularly
4. interacts with a cytoplasmic receptor
5. represses transcription

2.    Iodination of tyrosine residues of thyroglobulin is inhibited by

1. propranolol
2. methimazole
3. liothyronine
4. protirelin
5. hydrogen peroxide

3.    The characteristics of radioactive iodine (¹³¹I) in the treatment of hyperthyroidism include

1. a rapid onset of action
2. a maximum effect in 8 days
3. a cytotoxic effect produced by g rays
4. safe use in children and pregnant women
5. hypothyroidism as a typical later-onset disease

4.    The long elimination half-life of thyroxine (T4) is primarily due to

1. slow absorption from the gut
2. slow excretion in the urine
3. strong binding to thyroxine-binding globulin
4. slow hepatic inactivation
5. storage in fat cells