Podcast
Questions and Answers
What is the approximate daily secretion of T3 by the human thyroid gland?
What is the approximate daily secretion of T3 by the human thyroid gland?
- 2 μg
- 80 μg
- 7 nmol
- 4 μg (correct)
Which of the following is true about free thyroid hormones in plasma?
Which of the following is true about free thyroid hormones in plasma?
- They are in equilibrium with protein-bound thyroid hormones (correct)
- They do not inhibit pituitary secretion of TSH
- They are not physiologically active
- They are not added to the circulating pool by the thyroid
What is the normal total plasma T4 level in adults approximately?
What is the normal total plasma T4 level in adults approximately?
- 7 nmol/L
- 0.15 μg/dL
- 80 μg/dL
- 8 μg/dL (correct)
Which thyroid hormone is relatively lipophilic and has free forms in plasma that are physiologically active?
Which thyroid hormone is relatively lipophilic and has free forms in plasma that are physiologically active?
How do free thyroid hormones contribute to the regulation of TSH secretion?
How do free thyroid hormones contribute to the regulation of TSH secretion?
What is the main function of the thyroid gland?
What is the main function of the thyroid gland?
How is thyroglobulin secreted into the colloid in the thyroid gland?
How is thyroglobulin secreted into the colloid in the thyroid gland?
What enzyme mediates the oxidation and reaction of iodide with thyroglobulin?
What enzyme mediates the oxidation and reaction of iodide with thyroglobulin?
What happens to the thyroid hormones produced by the thyroid gland until they are needed?
What happens to the thyroid hormones produced by the thyroid gland until they are needed?
What is the first product formed in the thyroid hormone synthesis process?
What is the first product formed in the thyroid hormone synthesis process?
How is T3 formed in the thyroid hormone synthesis process?
How is T3 formed in the thyroid hormone synthesis process?
Which component serves as a reservoir of thyroid hormones in the thyroid gland?
Which component serves as a reservoir of thyroid hormones in the thyroid gland?
What could happen if a person ingests a diet completely devoid of iodide for a long time?
What could happen if a person ingests a diet completely devoid of iodide for a long time?
Which enzyme generates reactive iodine species for attacking thyroglobulin in the thyroid hormone synthesis process?
Which enzyme generates reactive iodine species for attacking thyroglobulin in the thyroid hormone synthesis process?
What compound is formed by the condensation of DIT with MIT in the thyroid hormone synthesis process?
What compound is formed by the condensation of DIT with MIT in the thyroid hormone synthesis process?
What is the average distribution of T4 in the normal human thyroid from iodinated compounds?
What is the average distribution of T4 in the normal human thyroid from iodinated compounds?
Which theory explains the coupling reaction where both DIT molecules are attached to thyroglobulin?
Which theory explains the coupling reaction where both DIT molecules are attached to thyroglobulin?
