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Chemistry Certification
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Subject
:
certifications
Instructions:
Answer 50 questions in 15 minutes.
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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. Cocaine is metabolized to...
(testing of urine for) delta-am.. acid
Tay-sachs
benzoylecogine
serum cortisol > 15
2. Diagnostic specificity is defined as the percentage of individuals...
WITHOUT a disease with a negative test
iron deficiency anemia
TLC
acute hepatitis
3. The most widely used support medium for electrophoretic separation of lipoproteins is...
iron deficiency anemia
agarose
B12 deficiency
increased vasoconstriction
4. Serum concentrations of vitamin B12 are elevated in...
endogenous triglycerides
growth - third trimester of pregnancy
immunofixation
CML
5. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
growth - third trimester of pregnancy
transferrin
serum cortisol > 15
normal - liver breakdown
6. Given the following values:100;120;150;140;130;What is the mean?
remove excess unbound iron
128
effluent line is obstructed
serum aliquots - one heated
7. Lasting serum phosphate concentration is controlled primarily by the...
specificity
transferrin
atomic absorption
parathyroid
8. In familial hypercholesterolemia - the hallmark finding is an elevation of...
LDL
acute hepatitis
aldolase
high carbohydrate diet for 3 days
9. Magnesium carbonate is added in an iron binding capacity determination in order to...
remove excess unbound iron
immunofixation
200x affinity for oxygen
Tay-sachs
10. While performing a serum lithium determination on a flame photometer with cesium as the internal standard - the technologist noticed that there was a flickering flame. The most probable cause of this problem is...
lipase
GGT
changes in the fuel
glucose oxidase
11. Which percentage of total serum calcium is nondiffusible protein bound?
0
40-50
incorrect aqueous to nonaqueous mixture
methyl alcohol
12. 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
increased vasoconstriction
peroxidase-like activity of hemoglobin
specificity
creatinine
13. This chemical determination may be of help in establishing the presence of seminal fluid
TSH
standard
obstructive jaundice
acid phosphatase
14. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
TSH
5mg higher
lead
correct for variations in flame and atomizer
15. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...
there is an absence of correlation
measure the total volume
have a negative charge
respiratory ACIDOSIS
16. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
serum aliquots - one heated
B12 deficiency
alpha 2 beta
LDL
17. The formula for calculating absorbance given the percent transmittance (%T) of a solution
creatinine clearance
2-log(T)
glass
CO2 and pH elevated
18. A reciprocal relationship exists between...
Calcium - phosphorus
show a decrease in glycosylated hgb
TLC
C3 complement
19. The hemoglobin that is resistant to alkali (KOH) denaturation is...
T4 by RIA
dihydroxyacetone side chain
chloride
F
20. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
glucose tolerance test
atomic absorption
pO2 increased HCO3 decreased
no decrease in serum growth hormone after 90 minutes
21. In the assay of lactate dehydrogenase - this product is actually measured
NADH
thiamine
effluent line is obstructed
normal - liver breakdown
22. Currently the most common method for specific identification and quantitation of serum barbiturates is...
cysteine
GLC
amylase and lipase
immunofixation
23. What substance gives feces its normal color?
CO2
ceruplasmin
urobilin
TSH
24. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
Prolactin
HCT
accuracy
acid phosphatase
25. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
specificity
CO2
LDL
check serum for hemolysis
26. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...
fall in pH - rise in pCO2
Temperature is a function of the number of particles in solution
1.1
serum aliquots - one heated
27. Ion selective electrodes are called selective rather than specific because they actually measure the...
volumetric flask
valine leucine isoleucine
brain
measures one ion more than others
28. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
testing heparinized plasma
cysteine
40-50
impaired response to ACTH stimulation
29. Spectrophotometers isolate a narrow band pass by means of...
GFR
electric current
biuret
prisms and grating
30. This steroid is an adrenal cortical hormone
WITHOUT a disease with a negative test
corticosterone
5
phenytoin
31. This is a regulatory hormone.
parathyroid hormone
coulometry
remove excess unbound iron
sample exposed to light
32. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?
beta
porphobilinogen synthetase
ionic charge
check serum for hemolysis
33. The greatest activities of serum AST and ALT are seen in...
C3 complement
hyperventilation
acute hepatitis
atomic absorption
34. Enzymes used in the diagnosis of acute pancreatitis?
glucose tolerance test
amylase and lipase
T4 by RIA
CK-MB
35. 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...
increased O2 decreased HCO3
without a disease with a negative test result
minimize the effects of interference
Calcium - phosphorus
36. 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?
adding an acid stabilizer
creatine kinase
128
TSH
37. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
measures one ion more than others
@ 100
2Na + glucose over 20 + BUN over 3
4.5
38. Lithium therapy is widely used in the treatment of...
ionic charge
serum cortisol > 15
hyperthyroidism
manic-depression
39. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
absorptivity x light path x concentration
attaching them to protein molecules
C
prisms and grating
40. A psychiatric patient was experiencing sever depression - but responded to treatment with amitriptyline with no apparent side effects. A blood sample was sent to the laboratory for therapeutic monitoring. Which drug level would be MOST reflective of
trig
acid phosphatase
breast cancer
amytriptyline 104
41. 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...
one micromole/minute
cyclic antidepressants
creatinine
4.5
42. An automated method for measuring chloride that generates silver ions in the reaction is...
1 mol/kg
coulometry
GLC
sodium potassium chloride CO2
43. The method of choice for diagnosis of a protracted attack of porphyria is...
the fetus is at risk for respiratory distress
hemolysis
HPLC analysis of porpobilinogen on 24hr urine
be able to detect 9/10 simple instrument malfunctions
44. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
BUN increased
valine leucine isoleucine
didymium filter
aldolase
45. The T3 resin uptake test is a measure of...
binding capacity of thyroxine-binding globulin
5 tri 15 cholesterol 50 protein
nephelometry
<45
46. Sixty to seventy-five percent of the plasma cholesterol is transported by...
have a negative charge
LDL
thyroxine binding globulin
2-log(T)
47. These enzymes of heme biosynthesis are inhibited by lead
porphobilinogen synthetase
emphysema
A1
properties of the membrane
48. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
absorptivity x light path x concentration
phenytoin
increased O2 decreased HCO3
TSH
49. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
bicarbonate carbonic acid
urobilin
1.9
respiratory ACIDOSIS
50. 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...
impaired response to ACTH stimulation
boderline results test should be repeated
65
pilocarpine
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