MLT Chemistry BOC Exam Questions and Answers All Correct
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MLT Chemistry BOC
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MLT Chemistry BOC
MLT Chemistry BOC Exam Questions and Answers All Correct
An emphysema patient suffering from fluid accumulation in the alveolar spaces is likely to be in what metabolic state? - Answer-respiratory acidosis
At blood pH 7.40, what is the ratio of bicarbonate to carbonic acid? - Answer-20:1
...
MLT Chemistry BOC Exam Questions
and Answers All Correct
An emphysema patient suffering from fluid accumulation in the alveolar spaces is likely
to be in what metabolic state? - Answer-respiratory acidosis
At blood pH 7.40, what is the ratio of bicarbonate to carbonic acid? - Answer-20:1
The reference range for the pH of arterial blood measured at 37C is? - Answer-7.35-
7.45
A 68-year-old man arrives in the emergency room with a glucose level of 722mg/dL and
serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to be? -
Answer-low pH
A patient is admitted to the emergency room in a state of metabolic alkalosis. Which of
the following would be consistent with this diagnosis? - Answer-high TCO3, increase
HCO3
A sweat chloride result of 55mEq/L and a sweat sodium of 52mEq/L were obtained on a
patient who has a history of respiratory problems. The best interpretation of these
results is? - Answer-borderline results, the test should be repeated
The solute that contributes the most to the total serum osmolality is? - Answer-sodium
A potassium level of 6.8mEq/L is obtained. Before reporting the results, the first step the
technologist should take is to? - Answer-check the serum for hemolysis
Which of the following electrolytes is the chief plasma cation whose main function is
maintaining osmotic pressure? - Answer-sodium
In respiratory acidosis, a compensatory mechanism is the increase in? - Answer-plasma
bicarbonate concentration
The buffering capacity of blood is maintained by a reversible exchange process
between bicarbonate and? - Answer-chloride
The anion gap is useful for quality control of laboratory results for? - Answer-sodium,
potassium, chloride, and TCO2
Serum "anion gap" is increased in patients with? - Answer-lactic acidosis
,Most of the carbon dioxide present in blood is in the form of? - Answer-bicarbonate ion
A patient with myeloproliferative disorder has the following values:
Hgb- 13g/dL
Hct- 38%
WBC- 30x10^3/uL
Platelets- 1000x10^3/uL
Serum Na- 140mEq/L
Serum K- 7mEq/L
The serum K should be confirmed by? - Answer-testing heparinized plasma
What battery of tests is most useful in evaluating an anion gap of 22mEq/L? - Answer-
BUN, Creatinine, Salicylate, and Methanol
Quantitation of Na and K by ion-selective electrode is the standard method because? -
Answer-of advances in electrochemistry
The most important buffer pair in plasma is the? - Answer-bicarbonate/carbonic acid
pair
Osmolal gap is the difference between? - Answer-calculated and measured osmolality
values
The degree to which the kidney concentrates the glomerular filtration rate can be
determined by? - Answer-urine to serum osmolality ratio
A patient had the following serum results:
Na- 140mEq/L
K- 4.0mEq/L
Glucose- 95mg/dL
BUN- 10mg/dL
Which osmolality is consistent with these results? - Answer-270
Select the test which evaluates renal tubular function? - Answer-osmolarity
The following laboratory results were obtained:
Serum Electrolytes:
Na- 136mEq/L
K- 4.4mEq/L
Cl- 92mEq/L
HCO3- 40mEq/L
Arterial Blood:
pH- 7.32
PCO2- 79mm/Hg
These results are most compatible with? - Answer-respiratory acidosis
, 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 will occur? - Answer-PO2 increased/ HCO3 decreased
Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content
due to changes in? - Answer-bicarbonate buffer
A common cause of respiratory alkalosis is? - Answer-hyperventilation
Respiratory acidosis is described as a(n)? - Answer-increase in CO2 content and PCO2
with a decreased pH
Metabolic acidosis can be described as a(n)? - Answer-decrease in CO2 content and
PCO2 with a decreased pH
A person suspected of having metabolic alkalosis would have which of the following
laboratory findings? - Answer-CO2 content and pH elevated
Following overnight fasting, hypoglycemia in adults is defined as a glucose of? -
Answer-less than or equal to 45mg/dL
The following results are from a 21-year-old patient with a back injury who appears
otherwise healthy:
Whole blood glucose - 77mg/dL
Serum glucose - 88mg/dL
CSF glucose - 56mg/dL
The best interpretation of these results is that? - Answer-all values are consistent with a
normal healthy individual
The preparation of a patient for standard glucose tolerance testing should include? -
Answer-a high carbohydrate diet for 3 days
If a fasting glucose was 90mg/dL, which of the following 2-hour postprandial glucose
results would most closely represent normal glucose metabolism? - Answer-100mg/dL
A healthy person with a blood glucose of 80mg/dL would have a simultaneously
determined CSF glucose value of? - Answer-50mg/dL
A 25 year old man became nauseated and vomited 90 minutes after receiving a
standard 75g carbohydrate dose for an oral glucose tolerance test. The best course of
action is to? - Answer-draw blood for glucose and discontinue test
CSF for glucose assay should be? - Answer-analyzed immediately
Which of the following 2 hour postprandial glucose values demonstrates unequivocal
hyperglycemia diagnostic for diabetes mellitus? - Answer-200mg/dL
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