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 most important buffer pair in plasma is the...
20:1
sample exposed to light
1.1
bicarbonate carbonic acid
2. The general types of interference in atomic absorption spectrophotometry...
bilirubindiglucuronide
chemical ionization matrix
have a negative charge
serum cortisol > 15
3. The identification of Bence Jones protein is best accomplished by...
immunofixation
glucose tolerance test
HDL
2-log(T)
4. A true statement about high performance liquid chromatography (HPLC) is that it...
correct for variations in flame and atomizer
HCT
band width
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
5. A spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument
band width
sharp cutoff filter
acute hepatitis
pO2 increased HCO3 decreased
6. 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?
show a decrease in glycosylated hgb
<1%
beta
cholesterol normal triglycerides elevated
7. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
para-hydroxylphenyl...
phenytoin
impaired response to ACTH stimulation
fetal and placenta function
8. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
fresh morning urine for delta-aminolevulinic acid
Solute moves half the distance of the solvent front
be able to detect 9/10 simple instrument malfunctions
ionization of carboxyl groups (yielding a net negative charge)
9. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
Hb S
BUN 80
without a disease with a negative test result
5mg higher
10. This applies to cryoscopic osmometry
5
cholesterol normal triglycerides elevated
Temperature is a function of the number of particles in solution
draw blood for glucose and discontinue test
11. 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?
monitoring the course of a known cancer
TSH
correct for variations in light intensity
high co2 and hco3
12. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
exchange of amino and keto groups
metabolic acidosis
testing heparinized plasma
T4 by RIA
13. A patient has the following results: Patient Values : Reference Values: Serum iron 250 ug/dL 60-150 ug/dL TIBC 350 ug/dL 300-35O ug/dL The best conclusion is that this patient has...
200x affinity for oxygen
cholesterol normal triglycerides elevated
iron hemochromatosis
plasma bicarbonate
14. 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
340
conjugated hyperbilirubinemia - hepatocellular obstruction
immunofixation
CO2 and pH elevated
15. The most heat labile fraction of alkaline phosphatase is obtained from...
lead
boderline results test should be repeated
bone
purulent
16. 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...
have a negative charge
intestinal malabsorption
exchange of amino and keto groups
metabolic acidosis
17. Calcium concentration in the serum is regulated by...
65
parathyroid hormone
one micromole/minute
high co2 and hco3
18. A patient in her 33rd week of pregnancy is hospitalized with toxemia. Her doctor would like to deliver the baby early because the toxemia is becoming more severe. The baby's best chance of delivery without respiratory distress due to lung immaturity
primary hyperparathyroidism
L/S ratio > 3.5
remove excess unbound iron
lower than in adults
19. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
591
20:1
respiratory acidosis
32
20. Blood received in the laboratory for blood gas analysis must meet these requirements
2Na + glucose over 20 + BUN over 3
thyroxine binding globulin
no ice clots bubbles
GLC
21. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
BUN increased
A1c
nephelometry
ammonia
22. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
plasma bicarbonate
measures one ion more than others
serum aliquots - one heated
acute intermittent porphyria
23. 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...
fraction absorbed into systemic circulation
one micromole/minute
immunofixation
impaired response to ACTH stimulation
24. 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
standard
crigler
F
amytriptyline 104
25. 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...
run a new set of controls
triglycerides
4.5
glycerol
26. In the Jaffe reaction - creatine reacts with...
BUN 80
200
alkaline picrate
conjugated hyperbilirubinemia - hepatocellular obstruction
27. 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...
lithium
CML
cancel test
multiplied by 4
28. An acid cleaning solution for glassware consists of...
boderline results test should be repeated
potassium dichromate in SA
iron deficiency anemia
impaired response to ACTH stimulation
29. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
hyperthyroidism
chloride
albumin
urinary free cortisol
30. 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?
can be separated into distinct phenotypes
pCO2
lead
D
31. 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...
maintain colloidal osmotic pressure
without a disease with a negative test result
LDL
pO2 increased HCO3 decreased
32. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
chylomicrons VLDL
primary hyperparathyroidism
viral hepatitis
trig
33. 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.
agarose
591
iron hemochromatosis
lipase
34. At a pH of 8.6 the gamma globulins move toward the cathode - despite the fact that they are negatively charged. What is this phenomenon called?
accuracy
properties of the membrane
65
endosmosis
35. What substance gives feces its normal color?
urobilin
LDL
valine leucine isoleucine
fresh morning urine for delta-aminolevulinic acid
36. 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?
be able to detect 9/10 simple instrument malfunctions
respiratory ACIDOSIS
Prolactin
without a disease with a negative test result
37. A carbonate salt used to control manic-depressive disorders is...
respiratory acidosis
lithium
measurement of absorbance at 450
CK-MB
38. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?
HDL
chemical ionization matrix
sodium
2Na + glucose over 20 + BUN over 3
39. 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
90%
Tay-sachs
200
ALP with fresh draw
40. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
LDL
1.9
turn off
creatinine clearance
41. A thick white turbid specimen was received in the laboratory labeled as pericardial fluid. A microscopic examination was performed - and the differential included 90% PMNs. The fluid is...
purulent
faster than gamma
breast cancer
plasma bicarbonate
42. The most widely used support medium for electrophoretic separation of lipoproteins is...
agarose
acute intermittent porphyria
creatinine clearance
porphobilinigen SCREEN
43. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
acute hepatitis
porphobilinigen SCREEN
prevent phosphate interference
didymium filter
44. A chemiluminescent EIA...
intestinal malabsorption
albumin
is quantitated by the amount of light produced
phenytoin
45. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
placenta
serum aliquots - one heated
0
tissue and serum levels need to reach equilibrium
46. 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
fetal and placenta function
1.1
low pH
47. An increase in serum acetone is indicative of a defect in the metabolism of...
carbs
increased vasoconstriction
check serum for hemolysis
120 minutes
48. The anion gap is useful for quality control of laboratory results for...
sodium potassium chloride CO2
porphobilinogen synthetase
200x affinity for oxygen
valine leucine isoleucine
49. 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...
thymolpthalein monophosphate
T4 by RIA
TSH
LDH
50. This would be an example of a glucose-specific colorimetric method
intestinal malabsorption
show a decrease in glycosylated hgb
SD over mean
glucose oxidase