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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. Patients with Cushing's syndrome exhibit...
2Na + glucose over 20 + BUN over 3
100 nmol
sharp fibrinogen peak
serum cortisol > 15
2. 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...
Mg
conjugated hyperbilirubinemia - hepatocellular obstruction
cancel test
prostate
3. Which percentage of total serum calcium is nondiffusible protein bound?
urobilin
a small concentration of APO-B containing lipoproteins after precipitation
respiratory acidosis
40-50
4. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
5 tri 15 cholesterol 50 protein
tissue and serum levels need to reach equilibrium
1 micromole per minute
whole blood can be used
5. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?
minimize the effects of interference
thymolpthalein monophosphate
fraction absorbed into systemic circulation
9
6. The reason carbon monoxide is so toxic is because it...
bicarbonate carbonic acid
prisms and grating
200x affinity for oxygen
endosmosis
7. The major fraction of organic iodine in the circulation is in the form of...
multiplied by 4
thyroxine
GFR
valine leucine isoleucine
8. The relative migration rate of proteins on cellulose acetate is based on...
dirty applicators
5 tri 15 cholesterol 50 protein
can be separated into distinct phenotypes
ionic charge
9. The general types of interference in atomic absorption spectrophotometry...
chemical ionization matrix
ionization of carboxyl groups (yielding a net negative charge)
65
turn off
10. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
128
faster than gamma
pituitary
Prolactin
11. Amino acid associated with a sulfhydryl group
cysteine
peroxidase-like activity of hemoglobin
parathyroid hormone
ionization of carboxyl groups (yielding a net negative charge)
12. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
glass
B12 deficiency
testing heparinized plasma
spun separated iced and tested immediately
13. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...
viral hepatitis
beta
hemolysis
accuracy
14. The unit of measure for a standard solution is...
mg/ml
measure the total volume
oxalacetate to malate
binding capacity of thyroxine-binding globulin
15. Detection of carriers of hereditary coproporphyria should include analysis of...
F
fresh morning urine for delta-aminolevulinic acid
100nmol
monitoring the course of a known cancer
16. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
impaired response to ACTH stimulation
M subunit is inactivated
Prolactin
can be separated into distinct phenotypes
17. 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
tissue and serum levels need to reach equilibrium
occult blood
quantitation of label
18. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
high co2 and hco3
acute intermittent porphyria
TLC
TSH
19. A breakdown product of hemoglobin is...
low pH
testing heparinized plasma
bilirubin
5mg higher
20. Diagnostic specificity is defined as the percentage of individuals...
bilirubindiglucuronide
tissue and serum levels need to reach equilibrium
WITHOUT a disease with a negative test
carbs
21. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
GGT
lead
100nmol
freezing point
22. To ensure an accurate ammonia level result - the specimen should be...
spun separated iced and tested immediately
glycerol
run a new set of controls
measurement of absorbance at 450
23. Most most likely to be ordered in addition to serum calcium to determine the cause of tetany?
Mg
endosmosis
no ice clots bubbles
amytriptyline 104
24. 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
lactic acidosis
90%
sharp fibrinogen peak
CML
25. In the assay of lactate dehydrogenase - this product is actually measured
alpha 2 beta
creatinine clearance
prostate
NADH
26. The anion gap is useful for quality control of laboratory results for...
BUN 80
1:5
sodium potassium chloride CO2
agarose
27. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...
low pH
thiamine
1.1
glucose
28. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase
urobilin
serum cortisol > 15
measure the total volume
acute hepatitis
29. In monitoring glomerular function - this test has the highest sensitivity
prostate
one micromole/minute
BUN 80
creatinine clearance
30. Cocaine is metabolized to...
albumin
remove excess unbound iron
benzoylecogine
urinary free cortisol
31. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
measurement of absorbance at 450
heparin
placenta
porphobilinogen screen
32. 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...
brain
lithium
volumetric flask
testing heparinized plasma
33. The Henderson-Hasselbalch equation
low pH
carbs
pH = pKa + log (salt/acid)
correct for variations in light intensity
34. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
phenytoin
atomic absorption
parathyroid
placenta
35. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
CML
Wilson's disease
didymium filter
acute hepatitis
36. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
exposure to CO
0
bicarbonate carbonic acid
20:1
37. In respiratory acidosis - a compensatory mechanism is the increase in...
phenytoin
the same as plasma glucose
plasma bicarbonate
128
38. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
iron deficiency anemia
glass
1.9
conjugated hyperbilirubinemia - hepatocellular obstruction
39. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
para-hydroxylphenyl...
porphobilinigen SCREEN
5
thiamine
40. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
prostate
low pH
1 mol/kg
maintain colloidal osmotic pressure
41. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
peroxidase-like activity of hemoglobin
dihydroxyacetone side chain
<1%
atomic absorption
42. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
128
correct for variations in light intensity
crigler
patient noncompliance
43. Bile acid concentrations are useful to assess...
g/MW
brain
hepatobiliary (obstruction?)
WITHOUT a disease with a negative test
44. In familial hypercholesterolemia - the hallmark finding is an elevation of...
LDL
cmpds based on molecular weight and size
manic-depression
intestinal malabsorption
45. The most important buffer pair in plasma is the...
maintain colloidal osmotic pressure
bicarbonate carbonic acid
GFR
5 tri 15 cholesterol 50 protein
46. This steroid is an adrenal cortical hormone
quantitation of label
Hb S
corticosterone
acute intermittent porphyria
47. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
purulent
no decrease in serum growth hormone after 90 minutes
SD over mean
glycerol
48. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
<45
methadone
incorrect aqueous to nonaqueous mixture
para-hydroxylphenyl...
49. This chemical determination may be of help in establishing the presence of seminal fluid
thyroxine
acid phosphatase
5mg higher
ceruplasmin
50. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
measures one ion more than others
thymolpthalein monophosphate
<45
bicarbonate buffer