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Chemistry Certification

Subject : certifications
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Serum concentrations of vitamin B12 are elevated in...






2. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...






3. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...






4. The principle of the occult blood test depends on the...






5. A 24-hour urine specimen (total volume = 1136 mL) is submitted to the laboratory for quantitative urine protein. Calculate the amount of protein excreted per day - if the total protein is 52 mg/dL.






6. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone






7. Hydrogen ion concentration (pH) in blood is usually determined by means of these electrodes?






8. The following laboratory results were obtained: Serum Calcium: Increased - Urine Calcium: Increased - Serum Phosphate: Decreased - Urine Phosphate: Increased Serum Alkaline Phosphatase: Normal or Increased These results are most compatible with...






9. Lasting serum phosphate concentration is controlled primarily by the...






10. The urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...






11. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...






12. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...






13. A stool specimen that appears black and tarry should be tested for the presence of...






14. The biuret reaction for the analysis of serum protein depends on the number...






15. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...






16. A reciprocal relationship exists between...






17. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...






18. Enzymes used in the diagnosis of acute pancreatitis?






19. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...






20. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...






21. Blood was collected in a serum separator tube from a patient who had been fasting since midnight. The time of collection was 7:00 AM. The laboratory test that should be re-collected is...






22. The preparation of a patient for standard tolerance testing should include...






23. This chemical determination may be of help in establishing the presence of seminal fluid






24. Bile acid concentrations are useful to assess...






25. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...






26. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?






27. Nephelometers measure light...






28. The most heat labile fraction of alkaline phosphatase is obtained from...






29. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?






30. The relative migration rate of proteins on cellulose acetate is based on...






31. Ninety percent of the copper present in plasma is bound to...






32. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...






33. A blood gas sample was sent to the lab on ice - and a bubble was present in the syringe. The blood had been exposed to room air for at least 30 minutes. The following change in blood gases occurred...






34. The glucose level in normal peritoneal fluid should be...






35. Coulometry is used to measure...






36. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other






37. The greatest activities of serum AST and ALT are seen in...






38. In familial hypercholesterolemia - the hallmark finding is an elevation of...






39. This enzymes catalyzes the conversion of starch to glucose and maltose






40. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...






41. This method offers the greatest sensitivity for HBsAg testing






42. The biologically most active - naturally occuring androgen is...






43. A serum sample was assayed for bilirubin at 10 AM and the result was 12 mg/dL. The same sample was retested at 3 PM. The result now is 8 mg/dL. The most likely explanation for this discrepancy is...






44. The normal concentration of proteins in cerebrospinal fluid - relative to serum protein - is...






45. A course of instruction is being planned to teach laboratory employees to correct simple malfunctions in selected laboratory instruments. In writing the objectives for this course - this would be most appropriate?






46. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?






47. A patient with myeloproliferative disorder has the following values: Hgb = 13 g/dL Hct = 38% WBC = 30 x 10^3/uL Platelets = 1000 x 10^3/uL Serum Na+ = 140 mEq/L Serum K+ = 7 mEq/L The serum K+ should be confirmed by...






48. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?






49. In the sweat test - the sweating stimulant is introduced to the skin by application of...






50. The following blood gas results were obtained: pH : 7.18 PO2: 86 mm Hg PCO2: 60 mm Hg O2 saturation: 92% HCO3-: 21 mEq/L TCO2: 23 mEq/L Base excess: -8.0 mEq/L The patient's results are compatible with...