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Chemistry Certification
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Study First
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. The urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...
manic-depression
32
catalyze redox reactions
elevated lactic acid - elevated pyruvate
2. In amniotic fluid - the procedure used to detect Rh isosensitization is...
digoxin
measurement of absorbance at 450
enzyme induction
phenytoin
3. Phenobarbital is a metabolite of...
glucose
binding capacity of thyroxine-binding globulin
primidone
measure the total volume
4. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...
pO2 increased HCO3 decreased
the fetus is at risk for respiratory distress
normal - liver breakdown
parathyroid hormone
5. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
thyroxine
placenta
check serum for hemolysis
low pH
6. Maple syrup urine disease is characterized by an increase in this urinary amino acids
alpha 2 beta
minimize the effects of interference
carbohydrate hyperalimentation
valine leucine isoleucine
7. Rickets is associated with deficiency of...
200
boderline results test should be repeated
albumin
D
8. Kernicterus is an abnormal accumulation of bilirubin in...
cmpds based on molecular weight and size
brain
20:1
prevent phosphate interference
9. 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...
lipase
chylomicrons
prevent phosphate interference
intestinal malabsorption
10. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
LDH
sodium
Wilson's disease
5
11. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...
bone
parathyroid
5mg higher
creatine kinase
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
cmpds based on molecular weight and size
2Na + glucose over 20 + BUN over 3
creatinine
pilocarpine
13. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
prisms and grating
120 minutes
0
5
14. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
glucose tolerance test
binding capacity of thyroxine-binding globulin
glucose
growth - third trimester of pregnancy
15. Which blood gas electrode is composed of calomel and glass?
albumin
porphobilinogen screen
1 micromole per minute
CO2
16. A common cause of respiratory alkalosis is...
hyperventilation
freezing point
pH pCO2 pO2
impaired response to ACTH stimulation
17. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...
there is an absence of correlation
respiratory acidosis
TSH
pilocarpine
18. 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
run a new set of controls
4.5
no decrease in serum growth hormone after 90 minutes
elevated lactic acid - elevated pyruvate
19. 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
ALP with fresh draw
340
cysteine
improving state of metabolic control (as indicated by fructosamine)
20. A low concentrarion of serum phosphorus is commonly found in...
specificity
LDH
carbohydrate hyperalimentation
glucose oxidase
21. In the liver - bilirubin is converted to...
<1%
ammonia
bilirubindiglucuronide
TLC
22. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
thyroxine binding globulin
TSH
T4 by RIA
20:1
23. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
enzyme immunoassay
coulometry
atomic absorption
carbs
24. 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...
lead
testing heparinized plasma
iron hemochromatosis
HPLC analysis of porpobilinogen on 24hr urine
25. If the correlation coefficient (r) of two variables is zero...
Hb S
lipase
there is an absence of correlation
improving state of metabolic control (as indicated by fructosamine)
26. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
patient noncompliance
peptide bonds
200x affinity for oxygen
decreased lecithin
27. When myocardial infarction occurs - the first enzyme to become elevated is...
be able to detect 9/10 simple instrument malfunctions
peroxidase-like activity of hemoglobin
hyperthyroidism
CK
28. Most automated blood gas analyzers directly measure...
pilocarpine
changes in the fuel
lower than in adults
pH pCO2 pO2
29. The chemical composition of HDL- cholesterol corresponds to...
5 tri 15 cholesterol 50 protein
hyperventilation
Tangier
Prolactin
30. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...
accuracy
amylase
chylomicrons VLDL
biuret
31. Enzymes used in the diagnosis of acute pancreatitis?
TLC
amylase and lipase
WITHOUT a disease with a negative test
properties of the membrane
32. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinogen screen
bilirubin
testosterone
serum aliquots - one heated
33. The concentration of serum carotene is affected MOST by...
@ 100
iron deficiency anemia
viral hepatitis
diet
34. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...
multiplied by 4
obstructive jaundice
5
Tay-sachs
35. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
0
increase in total circulating T4
9
nondiagnostic for MS
36. The most widely used support medium for electrophoretic separation of lipoproteins is...
340
acute intermittent porphyria
agarose
20:1
37. 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
act as carriers for ions
occult blood
high co2 and hco3
specimen exposure to light
38. The reason carbon monoxide is so toxic is because it...
bicarbonate carbonic acid
200x affinity for oxygen
increased vasoconstriction
digoxin
39. Stray light can be detected in a spectrophotometer by utilizing a...
CO2 and pH elevated
changes in the fuel
cancel test
sharp cutoff filter
40. The formula for calculating absorbance given the percent transmittance (%T) of a solution
glucose
2-log(T)
respiratory acidosis
endogenous triglycerides
41. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
hyperventilation
B12 deficiency
Mg
MI
42. The osmolality of a urine or serum specimen is measured by a change in the...
20:1
T4 by RIA
porphobilinigen SCREEN
freezing point
43. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
emphysema
lead
20:1
beta
44. 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
effluent line is obstructed
amylase and lipase
conjugated hyperbilirubinemia - hepatocellular obstruction
high co2 and hco3
45. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
exchange of amino and keto groups
chloride
tissue and serum levels need to reach equilibrium
atomic absorption
46. Fluctuation of the needle on a coulometric type titrator is most probably due to...
thymolpthalein monophosphate
enzyme immunoassay
dirty electrodes
<1%
47. The primary function of serum albumin in the peripheral blood is to...
1.1
valine leucine isoleucine
phenytoin
maintain colloidal osmotic pressure
48. A one MOLAL solution is equivalent to...
<1%
2Na + glucose over 20 + BUN over 3
1 mol/kg
100nmol
49. 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...
there is an absence of correlation
tissue and serum levels need to reach equilibrium
changes in the fuel
measures one ion more than others
50. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
improving state of metabolic control (as indicated by fructosamine)
didymium filter
endogenous triglycerides
LDH
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