Chapter 33: The thyroid

Chapter 33: The thyroid

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

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

Answer c: formed from thyroxine (T₄) intracellularly

1. Iodination of tyrosine residues of thyroglobulin is inhibited by

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

Answer b: methimazole

1. 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

Answer e: hypothyroidism as a typical later-onset disease

1. 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

Answer c: strong binding to thyroxine-binding globulin