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Anatomy of the Thyroid Gland

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Questions and Answers

What is the origin of parafollicular cells?

Mesoderm

Ectoderm

Neural crest or endoderm (correct)

Follicular cells

What is the function of calcitonin secreted by parafollicular cells?

Inhibits osteoclast activity (correct)

Stimulates osteoclast activity

Regulates thyroid hormone production

Stimulates thyroid hormone production

What is the trigger for calcitonin secretion?

Elevated thyroid hormone levels

Elevated blood Ca+2 levels (correct)

Elevated parathyroid hormone levels

Elevated blood glucose levels

What is the function of iodination of tyrosyl residues?

Formation of T3 and T4 Signup and view all the answers

What is the concentration of iodide in the thyroid follicle compared to the blood?

30-fold higher Signup and view all the answers

What is the role of thyroglobulin in thyroid hormone production?

Stores thyroid hormones Signup and view all the answers

What is the number of tyrosyl residues in thyroglobulin?

140 Signup and view all the answers

What promotes the production of thyroid hormones?

TSH Signup and view all the answers

What is the sequence of thyroid hormone production?

Thyroglobulin production, iodination, T3 and T4 formation Signup and view all the answers

What is the process by which iodinated thyroglobulin is broken down?

Endocytosis Signup and view all the answers

Anatomy of the Thyroid Gland

Choose a study mode

Podcast

Questions and Answers

What is the origin of parafollicular cells?

What is the function of calcitonin secreted by parafollicular cells?

What is the trigger for calcitonin secretion?

What is the function of iodination of tyrosyl residues?

What is the concentration of iodide in the thyroid follicle compared to the blood?

What is the role of thyroglobulin in thyroid hormone production?

What is the number of tyrosyl residues in thyroglobulin?

What promotes the production of thyroid hormones?

What is the sequence of thyroid hormone production?

What is the process by which iodinated thyroglobulin is broken down?

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