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Questions and Answers
Which of the following thyroid hormones is inactive until converted into its active form in the tissues?
Which of the following thyroid hormones is inactive until converted into its active form in the tissues?
- T4 (correct)
- T3
- TSH
- TRH
What is the primary mechanism by which TSH stimulates the activity of follicle cells?
What is the primary mechanism by which TSH stimulates the activity of follicle cells?
- ↓ NIS activity
- ↑ thyroglobulin breakdown (correct)
- ↓ thyroglobulin breakdown
- ↓ coupling of iodide to tyrosine
Which of the following conditions would most likely decrease the amount of binding protein in the plasma?
Which of the following conditions would most likely decrease the amount of binding protein in the plasma?
- Graves' disease
- Hyperthyroidism
- Hypothyroidism
- TBG deficiency (correct)
What is the primary role of thyroxine-binding proteins in the blood?
What is the primary role of thyroxine-binding proteins in the blood?
Which of the following hormones exerts negative feedback on the hypothalamus?
Which of the following hormones exerts negative feedback on the hypothalamus?
What is the effect of T3 on metabolic rate?
What is the effect of T3 on metabolic rate?
Which of the following drugs would most likely affect the binding of thyroxine to its protein transporter?
Which of the following drugs would most likely affect the binding of thyroxine to its protein transporter?
What is the primary mechanism by which TRH regulates thyroid hormone production?
What is the primary mechanism by which TRH regulates thyroid hormone production?
Which of the following is a characteristic of Hashimoto's thyroiditis?
Which of the following is a characteristic of Hashimoto's thyroiditis?
What is the primary purpose of thyroid function tests?
What is the primary purpose of thyroid function tests?
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