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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
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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. 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...
O2
enzyme immunoassay
parathyroid hormone
ratio of distance moved by solvent to distance moved by compound
2. 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...
fetal and placenta function
fresh morning urine for delta-aminolevulinic acid
normal - liver breakdown
elevated lactic acid - elevated pyruvate
3. 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...
testosterone
creatine kinase
65
low pH
4. 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...
increased O2 decreased HCO3
oxalacetate to malate
bicarbonate carbonic acid
1 mol/kg
5. A breakdown product of hemoglobin is...
pilocarpine
SD over mean
bilirubin
primidone
6. The following data were obtained on amniotic fluid from a gestation of 36 weeks' duration by menstrual dates: L/S = 2 Phosphatidyl glycerol not present This can be concluded from these data?
the fetus is at risk for respiratory distress
prostate
<1%
iron deficiency anemia
7. In monitoring glomerular function - this test has the highest sensitivity
120 minutes
effluent line is obstructed
primary hyperparathyroidism
creatinine clearance
8. In familial hypercholesterolemia - the hallmark finding is an elevation of...
L/S ratio > 3.5
LDL
90%
T4 by RIA
9. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
specimen exposure to light
200x affinity for oxygen
Prolactin
g/MW
10. Specimens for blood gas determination should be drawn into a syringe containing...
serum cortisol > 15
heparin
fresh morning urine for delta-aminolevulinic acid
enzyme induction
11. Diagnostic specificity is defined as the percentage of individuals...
high co2 and hco3
WITHOUT a disease with a negative test
HCT
bone
12. The osmolality of a urine or serum specimen is measured by a change in the...
ratio of distance moved by solvent to distance moved by compound
65
freezing point
crigler
13. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...
prostate
TSH
GGT
hemolysis
14. 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...
testing heparinized plasma
bone
no ice clots bubbles
creatinine
15. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
0
BUN 80
endogenous triglycerides
measure the total volume
16. Which percentage of total serum calcium is nondiffusible protein bound?
trig
40-50
591
TLC
17. 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...
iron hemochromatosis
lead
nephelometry
correct for variations in light intensity
18. Maple syrup urine disease is characterized by an increase in this urinary amino acids
valine leucine isoleucine
21-hydroxylase deficiency
ammonia
340
19. The most heat labile fraction of alkaline phosphatase is obtained from...
exposure to CO
acute intermittent porphyria
bone
32
20. This method employs a highly specific antibody to thyroxine
increased vasoconstriction
albumin
acute hepatitis
T4 by RIA
21. Characteristic of the Bence Jones protein that is used to distinguish it from other urinary proteins is its solubility...
@ 100
cyclic antidepressants
dirty applicators
enzyme induction
22. In the sweat test - the sweating stimulant is introduced to the skin by application of...
glucose oxidase
electric current
chloride
D
23. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?
beta
CK
one micromole/minute
5
24. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
<45
fraction absorbed into systemic circulation
ionic charge
parathyroid hormone
25. 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...
increase in total circulating T4
breast cancer
one micromole/minute
emphysema
26. 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
urobilin
ALP with fresh draw
ionization of carboxyl groups (yielding a net negative charge)
serum cortisol > 15
27. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
growth - third trimester of pregnancy
parathyroid
carbohydrate hyperalimentation
Calcium - phosphorus
28. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
valine leucine isoleucine
chloride
effluent line is obstructed
measurement of absorbance at 450
29. 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
low pH
100 nmol
Tay-sachs
nondiagnostic for MS
30. Detection of carriers of hereditary coproporphyria should include analysis of...
exposure to CO
fresh morning urine for delta-aminolevulinic acid
prisms and grating
bicarbonate carbonic acid
31. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
ionic charge
no decrease in serum growth hormone after 90 minutes
adding an acid stabilizer
Solute moves half the distance of the solvent front
32. Ion selective electrodes are called selective rather than specific because they actually measure the...
dirty electrodes
measures one ion more than others
aldolase
LDL
33. An automated method for measuring chloride that generates silver ions in the reaction is...
O2
ratio of distance moved by solvent to distance moved by compound
200x affinity for oxygen
coulometry
34. 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...
chloride
M subunit is inactivated
urobilin
low pH
35. The identification of Bence Jones protein is best accomplished by...
viral hepatitis
porphyrin and porphobilinogen screen
g/MW
immunofixation
36. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
B12 deficiency
absorptivity x light path x concentration
thyroxine binding globulin
draw blood for glucose and discontinue test
37. TSH is produced by the...
270
pituitary
manic-depression
HPLC analysis of porpobilinogen on 24hr urine
38. An HPLC operator notes that the column pressure is too high - is rising too rapidly - and the recorder output is not producing normal peaks. The most probable cause of the problem is...
transferrin
there is an absence of correlation
parathyroid
effluent line is obstructed
39. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
lipase
metabolic acidosis
4.5
plasma bicarbonate
40. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...
effluent line is obstructed
accuracy
2-log(T)
incorrect aqueous to nonaqueous mixture
41. The anion gap is useful for quality control of laboratory results for...
freezing point
M subunit is inactivated
sodium potassium chloride CO2
Calcium - phosphorus
42. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
binding capacity of thyroxine-binding globulin
minimize the effects of interference
WITHOUT a disease with a negative test
phenytoin
43. Cerebrospinal fluid for glucose assay should be...
specimen exposure to light
analyzed immediately
Calcium - phosphorus
exposure to CO
44. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
freezing point
ionization of carboxyl groups (yielding a net negative charge)
atomic absorption
absorptivity x light path x concentration
45. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
chloride
be able to detect 9/10 simple instrument malfunctions
acute intermittent porphyria
serum aliquots - one heated
46. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?
hyperventilation
sodium potassium chloride CO2
TSH
HDL
47. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
the fetus is at risk for respiratory distress
conjugated hyperbilirubinemia - hepatocellular obstruction
sodium potassium chloride CO2
didymium filter
48. 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?
the fetus is at risk for respiratory distress
C
Tay-sachs
cholesterol normal triglycerides elevated
49. An increase in serum acetone is indicative of a defect in the metabolism of...
carbs
conjugated hyperbilirubinemia - hepatocellular obstruction
agarose
100nmol
50. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...
boderline results test should be repeated
alpha 2 beta
porphobilinogen screen
Solute moves half the distance of the solvent front
Sorry!:) No result found.
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