SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. The following results were obtained in a creatinine clearance evaluation: Urine concentration 84 mg/dL Urine volume 1440 mL/24 hr Serum concentration 1.4 mg/dL Body surface area 1.60 m2 (average = 1.73 m2) The creatinine cle~trance in mL/min is...
128
65
specimen exposure to light
Calcium - phosphorus
2. In the atomic absorption method for calcium - lanthanum is used...
9
prevent phosphate interference
oxalacetate to malate
C3 complement
3. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
exposure to CO
iron deficiency anemia
decreased lecithin
lead
4. A pH of 7.0 represents a H+ concentration of...
bicarbonate buffer
prevent phosphate interference
turn off
100nmol
5. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
without a disease with a negative test result
LDL
respiratory ACIDOSIS
thyroxine binding globulin
6. Diagnostic specificity is defined as the percentage of individuals...
heparin
high co2 and hco3
one micromole/minute
without a disease with a negative test result
7. Given the following values:100;120;150;140;130;What is the mean?
GLC
(testing of urine for) delta-am.. acid
primary hyperparathyroidism
128
8. This method employs a highly specific antibody to thyroxine
urinary free cortisol
mg/ml
T4 by RIA
LDH
9. The unit of measure for a standard solution is...
one micromole/minute
mg/ml
glucose oxidase
Solute moves half the distance of the solvent front
10. Specimens for blood gas determination should be drawn into a syringe containing...
purulent
brain
pilocarpine
heparin
11. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
methadone
ionic charge
BUN 80
high co2 and hco3
12. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
ceruplasmin
128
without a disease with a negative test result
2Na + glucose over 20 + BUN over 3
13. Spectrophotometers isolate a narrow band pass by means of...
minimize the effects of interference
prisms and grating
4.5
5
14. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?
cholesterol normal triglycerides elevated
HCT
no ice clots bubbles
check serum for hemolysis
15. The measurement of light scattered by particles in the sample is the principle of...
cholesterol normal triglycerides elevated
creatinine clearance
effluent line is obstructed
nephelometry
16. Total iron-binding capacity measures the serum iron transporting capacity of...
nondiagnostic for MS
transferrin
inclusion of smokers and nonsmokers in the study population
minimize the effects of interference
17. Calcium concentration in the serum is regulated by...
0
lead
parathyroid hormone
breast cancer
18. The ability of a procedure to measure only the component(s) it claims to measure is called...
beta
lower than in adults
there is an absence of correlation
specificity
19. The formula for calculating the amount of moles of a chemical?
g/MW
band width
Wilson's disease
show a decrease in glycosylated hgb
20. A chemiluminescent EIA...
high carbohydrate diet for 3 days
manic-depression
correct for variations in flame and atomizer
is quantitated by the amount of light produced
21. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...
endogenous triglycerides
apoenzyme
thyroxine binding globulin
ratio of distance moved by solvent to distance moved by compound
22. This enzymes catalyzes the conversion of starch to glucose and maltose
amylase
absorptivity x light path x concentration
creatinine
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
23. A stool specimen that appears black and tarry should be tested for the presence of...
occult blood
5 tri 15 cholesterol 50 protein
fall in pH - rise in pCO2
valine leucine isoleucine
24. Scurvy is associated with deficiency of...
absorptivity x light path x concentration
chylomicrons VLDL
C
1 mol/kg
25. The primary function of serum albumin in the peripheral blood is to...
specimen exposure to light
conjugated hyperbilirubinemia - hepatocellular obstruction
maintain colloidal osmotic pressure
specificity
26. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
A1c
B12 deficiency
lithium
one micromole/minute
27. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
5 tri 15 cholesterol 50 protein
4.5
methadone
fetal and placenta function
28. In familial hypercholesterolemia - the hallmark finding is an elevation of...
LDL
MI
GGT
g/MW
29. The formula for coefficient of variation?
run a new set of controls
diet
SD over mean
no ice clots bubbles
30. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
parathyroid
testosterone
porphobilinigen SCREEN
prostate
31. The most important buffer pair in plasma is the...
9
bicarbonate carbonic acid
glucose oxidase
remove excess unbound iron
32. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
metabolic acidosis
5mg higher
CO2
quantitation of label
33. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
glass
CO2
glucose tolerance test
run a new set of controls
34. About 90% of phenytoin is excreted in the urine as...
porphyrin and porphobilinogen screen
the fetus is at risk for respiratory distress
para-hydroxylphenyl...
correct for variations in flame and atomizer
35. The osmolality of a urine or serum specimen is measured by a change in the...
mg/ml
placenta
testing heparinized plasma
freezing point
36. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
exposure to CO
1.9
aldolase
oxalacetate to malate
37. This chemical determination may be of help in establishing the presence of seminal fluid
Calcium - phosphorus
band width
acid phosphatase
increase in total circulating T4
38. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for
specimen exposure to light
LDL
multiplied by 4
B12 deficiency
39. Which percentage of total serum calcium is nondiffusible protein bound?
40-50
D
0
low pH
40. Turbidity in serum suggests elevation of...
glucose oxidase
patient noncompliance
C
chylomicrons
41. Patients with Cushing's syndrome exhibit...
chylomicrons
serum cortisol > 15
LDL
oxalacetate to malate
42. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
correct for variations in flame and atomizer
urinary free cortisol
1 mol/kg
nondiagnostic for MS
43. 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
HCT
measurement of absorbance at 450
pH pCO2 pO2
44. Blood received in the laboratory for blood gas analysis must meet these requirements
dihydroxyacetone side chain
no ice clots bubbles
T4 by RIA
ratio of distance moved by solvent to distance moved by compound
45. Blood samples were collected at the beginning of an exercise class and after 30 minutes of aerobic activity. This would be most consistent with the postexercise sample
diet
elevated lactic acid - elevated pyruvate
lactic acidosis
creatinine
46. 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
remove excess unbound iron
acute intermittent porphyria
methadone
manic-depression
47. 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
valine leucine isoleucine
amytriptyline 104
serum cortisol > 15
hyperthyroidism
48. Amino acid associated with a sulfhydryl group
100nmol
metabolic acidosis
cysteine
WITHOUT a disease with a negative test
49. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?
lead
electric current
CML
5
50. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
albumin
specificity
amylase and lipase
attaching them to protein molecules