Clinical Chemistry Lab Tests and Assays Quiz
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Questions and Answers

Which type of assay involves injection of test materials based on physiological responses?

  • Immunoradiometric
  • Competitive Protein Binding
  • Enzyme Multiple Immunosorbent Technique
  • Bioassay (correct)

    • Which technique uses a fluorescein-labeled hormone and measures polarized fluorescence?

  • Radioimmunoassay
  • Enzyme Linked Immunoassay
  • Fluorescence Polarization Immunoassay (correct)
  • Immunoradiometric

    • In which type of assay, the hormone concentration is inversely proportional to polarized fluorescence?

  • Bioassay
  • Fluorescence Polarization Immunoassay (correct)
  • Radioimmunoassay
  • Competitive Protein Binding

    • Which hormone requires fasting serum for its testing according to the text provided?

    <p>Growth Hormone</p> Signup and view all the answers

    Which type of assay involves competition for protein binding sites?

    <p>Competitive Protein Binding</p> Signup and view all the answers

    'Based on competition for protein binding sites' is a characteristic of which type of assay?

    <p>Competitive Protein Binding</p> Signup and view all the answers

    When is the best time to collect a blood sample for Prolactin testing?

    <p>Immediately after waking up</p> Signup and view all the answers

    What is a physiological stimulus for increased Prolactin levels?

    <p>Engaging in exercise</p> Signup and view all the answers

    Which medication can increase Prolactin levels?

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

    What serum level of Prolactin suggests the presence of a pituitary tumor?

    <p>&gt;2000mg/dL</p> Signup and view all the answers

    Which method is used for Prolactin testing?

    <p>Immunometric assay</p> Signup and view all the answers

    In neurogenic diabetes insipidus (DI), what is the response of the kidneys to exogenous ADH administration?

    <p>Kidneys rapidly act to conserve water</p> Signup and view all the answers

    What is the most important imaging method for evaluating the thyroid gland and parathyroid glands?

    <p>2D Ultrasonography</p> Signup and view all the answers

    What size of cystic changes and solid conditions can be detected using 2D Ultrasonography?

    <p>2 to 3 mm</p> Signup and view all the answers

    Which imaging technique offers a better degree of contrast than Ultrasonography?

    <p>Computed Tomography (CT)</p> Signup and view all the answers

    What is a key advantage of Computed Tomography (CT) over Magnetic Resonance Imaging (MRI)?

    <p>Better resolution of bone structures</p> Signup and view all the answers

    For which imaging technique is fine needle aspiration biopsy (FNAB) commonly used for the thyroid gland?

    <p>Magnetic Resonance Imaging (MRI)</p> Signup and view all the answers

    Which imaging method has a higher resolution for vascular abnormalities like pituitary tumors and hemangiomas?

    <p>Computed Tomography (CT)</p> Signup and view all the answers

    What is the primary purpose of the TSH test mentioned in the text?

    <p>To help detect primary thyroid disorders</p> Signup and view all the answers

    Which hormone level is expected to be increased in primary hypothyroidism?

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

    What is the significance of a high radioactive iodine uptake (RAIU) according to the text?

    <p>Suggests active hormone production</p> Signup and view all the answers

    When is thyroglobulin assay used according to the text?

    <p>As a postoperative marker for thyroid cancer</p> Signup and view all the answers

    What is the function of reverse T3 (rT3) as mentioned in the text?

    <p>Assesses euthyroid sick syndrome</p> Signup and view all the answers

    What does the Free Thyroxine Index (FT4I) help in correcting according to the text?

    <p>Euthyroid individuals</p> Signup and view all the answers

    In which condition would you expect to find decreased levels of TBG according to the text?

    <p>Anabolic steroids use</p> Signup and view all the answers

    What is the primary purpose of a fine-needle aspiration biopsy (FNAB) for thyroid nodules?

    <p>Assessment of residual or recurrent disease in thyroid cancer</p> Signup and view all the answers

    Which condition is characterized by increased levels of serum calcitonin according to the text?

    <p>Medullary thyroid carcinoma</p> Signup and view all the answers

    What is the main purpose of recombinant human TSH as mentioned in the text?

    <p>Detection of residual or recurrent disease in thyroid cancer</p> Signup and view all the answers

    What is the main function of Triiodothyronine (T3)?

    <p>Most active thyroid hormonal activity</p> Signup and view all the answers

    When is screening for thyroid disorders recommended?

    <p>At 35 years old and every 5 years thereafter</p> Signup and view all the answers

    What is the significance of an increase in plasma level of T3?

    <p>First abnormality seen in hyperthyroidism</p> Signup and view all the answers

    Which thyroid autoantibody is involved in Hashimoto's disease?

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

    What is the purpose of the TRH Stimulation Test?

    <p>Differentiate euthyroid and hyperthyroid patients</p> Signup and view all the answers

    What is the reference value for Tetraiodothyronine (T4) in neonates?

    <p>152-292 nmol/L</p> Signup and view all the answers

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