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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. Bile acid concentrations are useful to assess...
have a negative charge
hepatobiliary (obstruction?)
20:1
40-50
2. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
BUN 80
band width
albumin
GFR
3. The biologically most active - naturally occuring androgen is...
ceruplasmin
testosterone
100nmol
parathyroid hormone
4. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
enzyme immunoassay
glucose
emphysema
freezing point
5. Turbidity in serum suggests elevation of...
remove excess unbound iron
one micromole/minute
porphobilinogen synthetase
chylomicrons
6. Calcium concentration in the serum is regulated by...
diet
parathyroid hormone
hyperthyroidism
128
7. Ion selective electrodes are called selective rather than specific because they actually measure the...
B12 deficiency
dirty electrodes
can be separated into distinct phenotypes
measures one ion more than others
8. A true statement about high performance liquid chromatography (HPLC) is that it...
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
properties of the membrane
endosmosis
freezing point
9. Serum haptoglobin...
can be separated into distinct phenotypes
without a disease with a negative test result
2Na + glucose over 20 + BUN over 3
aldolase
10. This diseases results from a familial absence of high-density lioprotein
Tangier
placenta
corticosterone
glucose tolerance test
11. 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...
5
1 micromole per minute
alkaline picrate
270
12. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...
iron hemochromatosis
hyperventilation
inclusion of smokers and nonsmokers in the study population
1.1
13. This wavelengths is within the ultraviolet rang.
cancel test
potassium dichromate in SA
prostate
340
14. 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.
9
Calcium - phosphorus
591
ratio of distance moved by solvent to distance moved by compound
15. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
1.1
21-hydroxylase deficiency
A1c
run a new set of controls
16. Creatinine clearance is used to estimate the...
pituitary
enzyme immunoassay
run a new set of controls
GFR
17. Detection of carriers of hereditary coproporphyria should include analysis of...
increased O2 decreased HCO3
fetal and placenta function
fresh morning urine for delta-aminolevulinic acid
emphysema
18. 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...
freezing point
porphobilinigen SCREEN
creatine kinase
ionization of carboxyl groups (yielding a net negative charge)
19. In thin layer chromatography - the Rf value for a compound is given by the...
viral hepatitis
L/S ratio > 3.5
nephelometry
ratio of distance moved by solvent to distance moved by compound
20. The most important buffer pair in plasma is the...
urobilin
correct for variations in flame and atomizer
bicarbonate carbonic acid
plasma bicarbonate
21. 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...
bilirubindiglucuronide
cholesterol normal triglycerides elevated
chylomicrons VLDL
65
22. The most specific enzyme test for acute pancreatitis is...
D
specimen exposure to light
lipase
trig
23. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?
1:5
alpha 2 beta
conjugated hyperbilirubinemia - hepatocellular obstruction
creatinine
24. Kernicterus is an abnormal accumulation of bilirubin in...
brain
pH = pKa + log (salt/acid)
agarose
Solute moves half the distance of the solvent front
25. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
HCT
thymolpthalein monophosphate
65
check serum for hemolysis
26. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
1 micromole per minute
iron hemochromatosis
chloride
incorrect aqueous to nonaqueous mixture
27. A patient with type I insulin-dependent diabetes mellitus has the following results: Fasting blood glucose: 150 mg/dL (70-110 rng/dL) Hemoglobin A1c: 25% (6.0%-19.5%) Fructosamine: 3.0 mmol/L ( 2.0-5.3 mmol/L)
M subunit is inactivated
iron deficiency anemia
improving state of metabolic control (as indicated by fructosamine)
atomic absorption
28. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
40-50
GFR
chloride
didymium filter
29. In familial hypercholesterolemia - the hallmark finding is an elevation of...
LDL
monitoring the course of a known cancer
Tay-sachs
340
30. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
2Na + glucose over 20 + BUN over 3
CO2
65
CK
31. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
enzyme induction
cyclic antidepressants
electric current
BUN 80
32. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
ionic charge
faster than gamma
porphobilinigen SCREEN
33. A pH of 7.0 represents a H+ concentration of...
iron deficiency anemia
100 nmol
agarose
creatinine clearance
34. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
urinary free cortisol
didymium filter
adding an acid stabilizer
hepatobiliary (obstruction?)
35. Which blood gas electrode is composed of calomel and glass?
triglycerides
maintain colloidal osmotic pressure
CO2
check serum for hemolysis
36. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
ionic charge
acid phosphatase
quantitation of label
testing heparinized plasma
37. This electrolyte is the chief plasma cation whose main function is maintaining osmotic pressure
fetal and placenta function
sodium
emphysema
chylomicrons
38. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...
sharp cutoff filter
5 tri 15 cholesterol 50 protein
120 minutes
glucose
39. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...
endosmosis
hyperthyroidism
fall in pH - rise in pCO2
freezing point
40. The Henderson-Hasselbalch equation
remove excess unbound iron
pH = pKa + log (salt/acid)
Calcium - phosphorus
valine leucine isoleucine
41. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
urobilin
TSH
methyl alcohol
ionization of carboxyl groups (yielding a net negative charge)
42. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase
specimen exposure to light
porphobilinogen synthetase
acute hepatitis
parathyroid hormone
43. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
340
prostate
ammonia
C
44. The major fraction of organic iodine in the circulation is in the form of...
be able to detect 9/10 simple instrument malfunctions
atomic absorption
thyroxine
absorptivity x light path x concentration
45. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
impaired response to ACTH stimulation
C3 complement
BUN 80
improving state of metabolic control (as indicated by fructosamine)
46. In a double-beam photometer - the additional beam is used to...
correct for variations in light intensity
1:5
heparin
1.1
47. Blood received in the laboratory for blood gas analysis must meet these requirements
band width
no ice clots bubbles
Tay-sachs
multiplied by 4
48. 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
CK
growth - third trimester of pregnancy
agarose
creatinine
49. A person suspected of having metabolic alkalosis would have these laboratory findings
boderline results test should be repeated
oxalacetate to malate
CO2 and pH elevated
albumin
50. Serum anion gap is increased in patients with...
carbohydrate hyperalimentation
testing heparinized plasma
lactic acidosis
inclusion of smokers and nonsmokers in the study population
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