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Questions and Answers
Which hormone is comprised of T4 and T3?
How many iodine atoms does T4 contain in each molecule?
What is the major use of iodine in the body?
Which hormone binds and transports T3 and T4?
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Where are thyroid hormones synthesized and stored?
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What is the major derangement in iodine deficiency?
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Where is iodide ingested in the body?
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What are T3 and T4?
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What is transthyretin formerly known as?
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Which hormone is responsible for normal thyroid function?
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What controls thyroid hormone secretion?
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Which hormone is more potent and has a rapid metabolic action?
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What are the effects of thyroid hormones on the body?
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What are the symptoms of adult hypothyroidism?
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What is the primary screening test for thyroid function?
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What is the role of calcitonin, secreted by the thyroid gland?
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What is the result of congenital hypothyroidism?
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What is the impact of hyperthyroidism on the body?
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What influences the regulation of normal thyroid hormone production?
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What is the purpose of assessing thyroid function?
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What is the normal range for serum free T4?
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Which hormone is the only metabolically active fraction of T4?
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What is the recommended range for serum T3?
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What does the measurement of total T3 or T4 include?
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What is the main purpose of measuring TSH?
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What percentage of T4 is bound to TBG?
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Which method is the procedure of choice for monitoring changes in T4 secretion during treatment for hyperthyroidism?
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What is the recommended approach by the US Preventive Services Task Force (USPSTF) for routine screening of adults for thyroid disease?
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What is the primary function of serum T3 and T4 measurement?
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What is the recommendation of the American Thyroid Association regarding screening for thyroid disease in pregnant women?
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Study Notes
Thyroid Gland Function and Regulation
- The thyroid gland efficiently concentrates iodide from the blood to produce thyroid hormones through a process involving tyrosine and iodine molecules
- Thyroid hormone secretion is controlled by TSH from the anterior pituitary gland through a negative feedback mechanism
- Euthyroid refers to normal thyroid hormone production, regulated by TRH from the hypothalamus, influenced by environmental factors such as temperature changes
- Thyroid hormones, T4 and T3, control cellular metabolic activity, with T3 being more potent and having a rapid metabolic action
- Thyroid hormones affect cell replication, brain development, and normal growth, influencing major organ systems and tissue function
- Calcitonin, secreted by the thyroid gland, reduces plasma calcium levels by increasing its deposition in bone
- Congenital hypothyroidism results in intellectual disability and stunted growth, while adult hypothyroidism manifests as lethargy, weight gain, and slow body functions
- Hyperthyroidism leads to an increased metabolic rate and is associated with an enlarged thyroid gland known as a goiter
- Assessment of thyroid function involves diagnostic measures such as thyroid function tests, thyroid scanning, biopsy, and ultrasonography
- Thyroid tests may involve the use of iodine, and patients should be asked about allergies to iodine or shellfish and medications containing iodine
- Numerous medications may affect thyroid test results and should be documented in the patient’s electronic health record
- The primary screening test for thyroid function is the measurement of serum TSH concentration
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Description
Test your knowledge of thyroid gland function and regulation with this quiz. Explore topics such as thyroid hormone production, feedback mechanisms, effects on metabolism and growth, thyroid disorders, diagnostic measures, and medication influences on thyroid tests.
