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

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

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

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

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

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

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

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

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

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

<p>Tyrosine molecule processing (D)</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) (C)</p> Signup and view all the answers

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

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

"Wolff-Chaikoff Effect" mimics which hormone?

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

"Wolff-Chaikoff Effect" is caused by:

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

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