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Questions and Answers
What is the origin of parafollicular cells?
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?
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?
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?
What is the function of iodination of tyrosyl residues?
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What is the concentration of iodide in the thyroid follicle compared to the blood?
What is the concentration of iodide in the thyroid follicle compared to the blood?
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What is the role of thyroglobulin in thyroid hormone production?
What is the role of thyroglobulin in thyroid hormone production?
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What is the number of tyrosyl residues in thyroglobulin?
What is the number of tyrosyl residues in thyroglobulin?
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What promotes the production of thyroid hormones?
What promotes the production of thyroid hormones?
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What is the sequence of thyroid hormone production?
What is the sequence of thyroid hormone production?
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What is the process by which iodinated thyroglobulin is broken down?
What is the process by which iodinated thyroglobulin is broken down?
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