Thyroid Anatomy and Development
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Questions and Answers

Where does the pyramidal lobe of the thyroid gland form from?

  • Floor of the pharynx (correct)
  • Superior thyroid artery
  • Subclavian artery
  • Inferior thyroid artery
  • What is the blood supply for the superior thyroid lobe?

  • Common carotid artery
  • Brachiocephalic artery
  • External carotid artery (correct)
  • Inferior thyroid artery
  • In which part of the body does the thyroglossal duct initially maintain connection?

  • Tongue (correct)
  • Stomach
  • Lungs
  • Thyroid gland
  • What is the usual characteristic of a midline neck mass that is a remnant of the thyroglossal duct?

    <p>Painless and moves up with swallowing</p> Signup and view all the answers

    Where is the most common location for functioning thyroid tissue outside of the gland?

    <p>Base of the tongue</p> Signup and view all the answers

    When may functioning thyroid tissue outside of the gland be commonly detected?

    <p>During adolescence</p> Signup and view all the answers

    What does an increase in Thyroid Stimulating Hormone (TSH) lead to?

    <p>Growth of ectopic tissue</p> Signup and view all the answers

    What element does the thyroid gland contain that is essential for hormone synthesis?

    <p>Iodine</p> Signup and view all the answers

    What are the two hormones synthesized by the follicular cells of the thyroid?

    <p>T3 and T4</p> Signup and view all the answers

    What is the main function of thyroglobulin in thyroid hormone production?

    <p>Tyrosine molecule processing</p> Signup and view all the answers

    What is the name of the enzyme responsible for catalyzing the oxidation of iodide and organification of iodine into MIT/DIT?

    <p>Thyroid Peroxidase (TPO)</p> Signup and view all the answers

    Which drug inhibits TPO and reduces T3/T4 production from the thyroid gland?

    <p>Propylthiouracil (PTU)</p> Signup and view all the answers

    "Wolff-Chaikoff Effect" mimics which hormone?

    <p>(T4)</p> Signup and view all the answers

    "Wolff-Chaikoff Effect" is caused by:

    <p>Excessive iodine intake</p> Signup and view all the answers

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