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Test your basic knowledge |
Chemistry Certification
Start Test
Study First
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. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
draw blood for glucose and discontinue test
trig
oxalacetate to malate
1 mol/kg
2. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi
diet
increased O2 decreased HCO3
one micromole/minute
Tay-sachs
3. A 2-year-old child with a decreased serum T4 is described as being somewhat dwarfed - stocky - overweight - and having coarse features. Of the following - the most informative additional laboratory test would be the serum...
TSH
increased O2 decreased HCO3
GFR
M subunit is inactivated
4. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
enzyme induction
GGT
alkaline picrate
HCT
5. 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...
scattered at a right angle
emphysema
amytriptyline 104
act as carriers for ions
6. 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
bicarbonate buffer
Tay-sachs
inclusion of smokers and nonsmokers in the study population
7. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
sharp fibrinogen peak
GGT
faster than gamma
run a new set of controls
8. An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated from the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure...
sodium potassium chloride CO2
bicarbonate buffer
O2
intestinal malabsorption
9. The relative migration rate of proteins on cellulose acetate is based on...
LDL
<45
hyperventilation
ionic charge
10. Kernicterus is an abnormal accumulation of bilirubin in...
potassium dichromate in SA
volumetric flask
brain
no ice clots bubbles
11. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
acid phosphatase
lead
pH = pKa + log (salt/acid)
dirty applicators
12. The most specific enzyme test for acute pancreatitis is...
electric current
lipase
L/S ratio > 3.5
analyzed immediately
13. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...
a small concentration of APO-B containing lipoproteins after precipitation
one micromole/minute
dihydroxyacetone side chain
phenytoin
14. Amino acid associated with a sulfhydryl group
multiplied by 4
intestinal malabsorption
cysteine
draw blood for glucose and discontinue test
15. 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...
bicarbonate carbonic acid
primary hyperparathyroidism
0
respiratory acidosis
16. 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...
no decrease in serum growth hormone after 90 minutes
fall in pH - rise in pCO2
1.1
endogenous triglycerides
17. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt
90%
remove excess unbound iron
tissue and serum levels need to reach equilibrium
hyperthyroidism
18. Total iron-binding capacity measures the serum iron transporting capacity of...
120 minutes
transferrin
Mg
ALP with fresh draw
19. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
CO2 and pH elevated
glucose tolerance test
1:5
monitoring the course of a known cancer
20. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinigen SCREEN
CO2
glass
32
21. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...
cmpds based on molecular weight and size
carbs
90%
dirty applicators
22. 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
creatinine
wavelength
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
dirty electrodes
23. Cocaine is metabolized to...
prisms and grating
Hb S
oxalacetate to malate
benzoylecogine
24. 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?
CO2 and pH elevated
sodium potassium chloride CO2
Mg
TSH
25. Nephelometers measure light...
scattered at a right angle
fresh morning urine for delta-aminolevulinic acid
acid phosphatase
intestinal malabsorption
26. 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...
without a disease with a negative test result
enzyme immunoassay
triglycerides
21-hydroxylase deficiency
27. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
methyl alcohol
bone
respiratory ACIDOSIS
270
28. Clinical assays for tumor markers are the most important for...
monitoring the course of a known cancer
growth - third trimester of pregnancy
enzyme immunoassay
multiplied by 4
29. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
chloride
boderline results test should be repeated
intestinal malabsorption
hemolysis
30. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
acute intermittent porphyria
porphobilinigen SCREEN
2Na + glucose over 20 + BUN over 3
lithium
31. 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...
acute hepatitis
CO2
MI
changes in the fuel
32. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?
thyroxine
testing heparinized plasma
270
freezing point
33. Major actions of angiotensin II include...
para-hydroxylphenyl...
increased vasoconstriction
patient noncompliance
CO2
34. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
2Na + glucose over 20 + BUN over 3
volumetric flask
porphyrin and porphobilinogen screen
growth - third trimester of pregnancy
35. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
parathyroid
BUN 80
chylomicrons
creatine kinase
36. A stool specimen that appears black and tarry should be tested for the presence of...
M subunit is inactivated
is quantitated by the amount of light produced
occult blood
100 nmol
37. Scurvy is associated with deficiency of...
C
@ 100
serum aliquots - one heated
specificity
38. Most chemical methods for determining total protein utilize this reaction?
biuret
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
pH pCO2 pO2
apoenzyme
39. The glucose level in normal peritoneal fluid should be...
the same as plasma glucose
changes in the fuel
run a new set of controls
T4 by RIA
40. The fast hemoglobin fraction is...
A1
20:1
cyclic antidepressants
inclusion of smokers and nonsmokers in the study population
41. In familial hypercholesterolemia - the hallmark finding is an elevation of...
oxalacetate to malate
dirty electrodes
transferrin
LDL
42. About 90% of phenytoin is excreted in the urine as...
glucose tolerance test
check serum for hemolysis
para-hydroxylphenyl...
spun separated iced and tested immediately
43. Diagnostic specificity is defined as the percentage of individuals...
sample exposed to light
CK-MB
purulent
without a disease with a negative test result
44. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
patient noncompliance
oxalacetate to malate
ammonia
a small concentration of APO-B containing lipoproteins after precipitation
45. The measurement of light scattered by particles in the sample is the principle of...
atomic absorption
parathyroid
obstructive jaundice
nephelometry
46. A patient with glomerulonephritis would present the following serum results...
cmpds based on molecular weight and size
BUN increased
hepatobiliary (obstruction?)
act as carriers for ions
47. To ensure an accurate ammonia level result - the specimen should be...
CK-MB
spun separated iced and tested immediately
ALP with fresh draw
Calcium - phosphorus
48. 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
acute hepatitis
brain
Calcium - phosphorus
49. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...
can be separated into distinct phenotypes
inclusion of smokers and nonsmokers in the study population
Temperature is a function of the number of particles in solution
parathyroid hormone
50. A carbonate salt used to control manic-depressive disorders is...
lithium
C3 complement
creatinine
low pH