Clinical Chemistry Lab Tests and Assays Quiz

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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?

Growth Hormone Signup and view all the answers

Which type of assay involves competition for protein binding sites?

Competitive Protein Binding Signup and view all the answers

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

Competitive Protein Binding Signup and view all the answers

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

Immediately after waking up Signup and view all the answers

What is a physiological stimulus for increased Prolactin levels?

Engaging in exercise Signup and view all the answers

Which medication can increase Prolactin levels?

Prozac Signup and view all the answers

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

>2000mg/dL Signup and view all the answers

Which method is used for Prolactin testing?

Immunometric assay Signup and view all the answers

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

Kidneys rapidly act to conserve water Signup and view all the answers

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

2D Ultrasonography Signup and view all the answers

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

2 to 3 mm Signup and view all the answers

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

Computed Tomography (CT) Signup and view all the answers

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

Better resolution of bone structures Signup and view all the answers

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

Magnetic Resonance Imaging (MRI) Signup and view all the answers

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

Computed Tomography (CT) Signup and view all the answers

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

To help detect primary thyroid disorders Signup and view all the answers

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

TSH Signup and view all the answers

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

Suggests active hormone production Signup and view all the answers

When is thyroglobulin assay used according to the text?

As a postoperative marker for thyroid cancer Signup and view all the answers

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

Assesses euthyroid sick syndrome Signup and view all the answers

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

Euthyroid individuals Signup and view all the answers

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

Anabolic steroids use Signup and view all the answers

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

Assessment of residual or recurrent disease in thyroid cancer Signup and view all the answers

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

Medullary thyroid carcinoma Signup and view all the answers

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

Detection of residual or recurrent disease in thyroid cancer Signup and view all the answers

What is the main function of Triiodothyronine (T3)?

Most active thyroid hormonal activity Signup and view all the answers

When is screening for thyroid disorders recommended?

At 35 years old and every 5 years thereafter Signup and view all the answers

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

First abnormality seen in hyperthyroidism Signup and view all the answers

Which thyroid autoantibody is involved in Hashimoto's disease?

Thyroperoxidase (TPO) Signup and view all the answers

What is the purpose of the TRH Stimulation Test?

Differentiate euthyroid and hyperthyroid patients Signup and view all the answers

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

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