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Chemistry Certification
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Study First
Subject
:
certifications
Instructions:
Answer 50 questions in 15 minutes.
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study here
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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. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
bicarbonate carbonic acid
HCT
urinary free cortisol
heparin
2. In electrophoresis of proteins - when the sample is placed in an electric field connected to a buffer of pH 8.6 - all of the proteins...
have a negative charge
the same as plasma glucose
B12 deficiency
cysteine
3. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
carbs
plasma bicarbonate
metabolic acidosis
endosmosis
4. Technical problems encountered during the collection of an amniotic fluid specimen caused doubt as to whether the specimen was amniotic in origin. This procedure would establish that the fluid is amniotic in origin
remove excess unbound iron
creatinine
corticosterone
CO2
5. In competitive inhibition of an enzyme reaction the...
without a disease with a negative test result
inhibitor binds to enzyme at same site as substrate
Tay-sachs
heparin
6. This diseases results from a familial absence of high-density lioprotein
1 micromole per minute
hyperthyroidism
HDL
Tangier
7. A 45-year-old woman complains of fatigue - heat intolerance - and hair loss. Serum thyroxine and 125I-T3 resin uptake are abnormally low. What test would confirm that this is a pituitary deficiency?
there is an absence of correlation
TSH
enzyme induction
90%
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...
measurement of absorbance at 450
20:1
primary hyperparathyroidism
atomic absorption
9. Amino acid associated with a sulfhydryl group
591
bicarbonate buffer
cysteine
no decrease in serum growth hormone after 90 minutes
10. The most specific enzyme test for acute pancreatitis is...
lipase
oxalacetate to malate
remove excess unbound iron
exchange of amino and keto groups
11. When the exact concentration of the solute of a solution is known and is used to evaluate the concentration of an unknown solution - the known solution is...
valine leucine isoleucine
TSH
accuracy
standard
12. In the Jaffe reaction - creatine reacts with...
lead
1.9
alkaline picrate
LDL
13. Upon completion of a run of cholesterol tests - the technician recognizes that the controls are not within the two standard deviations confidence range. What is the appropriate course of action?
run a new set of controls
alkaline picrate
GGT
without a disease with a negative test result
14. About 90% of phenytoin is excreted in the urine as...
increased O2 decreased HCO3
O2
para-hydroxylphenyl...
incorrect aqueous to nonaqueous mixture
15. When myocardial infarction occurs - the first enzyme to become elevated is...
one micromole/minute
3500
CK
breast cancer
16. Upon completion of a run of cholesterol tests - the technician recognizes that the controls are not within the two standard deviations confidence range. What is the appropriate course of action
low pH
O2
nephelometry
run a new set of controls
17. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u
conjugated hyperbilirubinemia - hepatocellular obstruction
F
(testing of urine for) delta-am.. acid
thyroxine binding globulin
18. Serum from a patient with metastatic carcinoma of the prostate was separated from the clot and stored at room temperature. The following results were obtained: Patient Reference Range Calcium: 10.8 mg/dL 8.8-10.3 mg/dL LD:420 U/L 50-150 U/L Acid phos
bilirubindiglucuronide
immunofixation
ALP with fresh draw
Tangier
19. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
peptide bonds
128
aldolase
pilocarpine
20. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
hepatobiliary (obstruction?)
enzyme induction
serum aliquots - one heated
urobilin
21. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
glucose tolerance test
MI
urinary free cortisol
enzyme induction
22. Serum anion gap is increased in patients with...
lactic acidosis
didymium filter
pCO2
glycerol
23. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
M subunit is inactivated
glass
urinary free cortisol
viral hepatitis
24. One international unit of enzyme activity is the amount of enzyme that - under specified reaction conditions of substrate concentration - pH - and temperature - causes utilization of substrate at the rate of...
thyroxine binding globulin
sharp cutoff filter
1 micromole per minute
ceruplasmin
25. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
bilirubin
one micromole/minute
(testing of urine for) delta-am.. acid
respiratory ACIDOSIS
26. An increase in serum acetone is indicative of a defect in the metabolism of...
carbs
improving state of metabolic control (as indicated by fructosamine)
triglycerides
immunofixation
27. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
sharp cutoff filter
270
lead
100 nmol
28. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
1.9
MI
5 tri 15 cholesterol 50 protein
lactic acidosis
29. A chemiluminescent EIA...
creatine kinase
is quantitated by the amount of light produced
high co2 and hco3
measurement of absorbance at 450
30. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...
boderline results test should be repeated
absorptivity x light path x concentration
5 tri 15 cholesterol 50 protein
diet
31. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?
40-50
O2
beta
TLC
32. Coulometry is used to measure...
attaching them to protein molecules
chloride
urobilin
measurement of absorbance at 450
33. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
standard
Hb S
21-hydroxylase deficiency
128
34. Magnesium carbonate is added in an iron binding capacity determination in order to...
bilirubin
remove excess unbound iron
Solute moves half the distance of the solvent front
120 minutes
35. The selectivity of an ion-selective electrode is determined by the...
@ 100
21-hydroxylase deficiency
properties of the membrane
enzyme immunoassay
36. 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...
1.1
fall in pH - rise in pCO2
32
no ice clots bubbles
37. The unit of measure for a standard solution is...
properties of the membrane
plasma bicarbonate
trig
mg/ml
38. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus
parathyroid
200
manic-depression
elevated lactic acid - elevated pyruvate
39. Serum concentrations of vitamin B12 are elevated in...
CML
chemical ionization matrix
iron hemochromatosis
cholesterol normal triglycerides elevated
40. A potentiometric electrode that measures an analyte that passes through a selectively premeable membrane and rapidly enters into an equilibrium with an electrolyte solution is...
pCO2
lithium
Hb S
increased O2 decreased HCO3
41. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
porphobilinogen screen
carbohydrate hyperalimentation
pilocarpine
thyroxine binding globulin
42. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
340
a small concentration of APO-B containing lipoproteins after precipitation
minimize the effects of interference
have a negative charge
43. 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...
MI
D
2-log(T)
testing heparinized plasma
44. Turbidity in serum suggests elevation of...
chylomicrons
ALP with fresh draw
elevated lactic acid - elevated pyruvate
correct for variations in flame and atomizer
45. After a difficult venipuncture requiring prolonged application of the tourniquet - the serum K+ was found to be 6.8 mEq/L. The best course of action is to...
cancel test
elevated lactic acid - elevated pyruvate
valine leucine isoleucine
5 tri 15 cholesterol 50 protein
46. The glucose level in normal peritoneal fluid should be...
591
testosterone
the same as plasma glucose
TSH
47. This wavelengths is within the ultraviolet rang.
occult blood
high co2 and hco3
340
glass
48. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...
tissue and serum levels need to reach equilibrium
electric current
Prolactin
intestinal malabsorption
49. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...
endogenous triglycerides
multiplied by 4
specificity
triglycerides
50. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
<1%
<45
591
sodium
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