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Questions and Answers
Which Class III antiarrhythmic drug contains iodine and can cause hypothyroidism via excess iodine?
Which Class III antiarrhythmic drug contains iodine and can cause hypothyroidism via excess iodine?
- Sotalol
- Amiodarone (correct)
- Flecainide
- Dofetilide
What is the name of the effect whereby amiodarone inhibits the conversion of T4 to T3?
What is the name of the effect whereby amiodarone inhibits the conversion of T4 to T3?
- Hawthorn Effect
- Wolff-Chaikoff Effect (correct)
- Hawthorne Effect
- Placebo Effect
Which isotope of iodine emits radiation and competes with elemental iodine for uptake in the thyroid gland?
Which isotope of iodine emits radiation and competes with elemental iodine for uptake in the thyroid gland?
- I133
- I129
- I125
- I131 (correct)
What is the major regulatory protein for the availability of T4 and T3 to tissues?
What is the major regulatory protein for the availability of T4 and T3 to tissues?
Which hormone raises TBG levels and modifies TBG molecules, leading to a rise in total T4 levels?
Which hormone raises TBG levels and modifies TBG molecules, leading to a rise in total T4 levels?
What is the most common cause of mental retardation that is treatable?
What is the most common cause of mental retardation that is treatable?
Which hormone, produced by the thyroid, inhibits osteoclasts and suppresses resorption of bone?
Which hormone, produced by the thyroid, inhibits osteoclasts and suppresses resorption of bone?
Which condition results from childhood hypothyroidism and leads to stunted growth and mental retardation?
Which condition results from childhood hypothyroidism and leads to stunted growth and mental retardation?
What does TSH (thyrotropin) released by the anterior pituitary activate in the thyroid gland?
What does TSH (thyrotropin) released by the anterior pituitary activate in the thyroid gland?
Which metabolic effect is seen in hyperthyroid patients?
Which metabolic effect is seen in hyperthyroid patients?
Which hormone lowers serum calcium levels and inhibits osteoclasts?
Which hormone lowers serum calcium levels and inhibits osteoclasts?
Which hormone plays a minor role in calcium handling in humans but can be used as pharmacologic therapy for hypercalcemia?
Which hormone plays a minor role in calcium handling in humans but can be used as pharmacologic therapy for hypercalcemia?
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