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Premature atherosclerosis can occur when which of the following becomes elevated?
Transportation of 60-75% of the plasma cholesterol is performed by:
Which of the following diseases results from a familial absence of high density lipoprotein?
A 1-year-old girl with a hyperlipoproteinemia and lipoprotein lipase deficiency has the lipid profile results shown in this table:
|
test |
result |
|
cholesterol |
300 mg/dL (7.77 mmol/L) |
|
LDL |
increased |
|
HDL |
decreased |
|
triglycerides |
1200 mg/dL (13.56 mmol/L) |
|
chylomicrons |
present |
A serum specimen from this patient that is refrigerated overnight would most likely appear:
Which of the following lipid results would be expected to be falsely elevated on a serum specimen from a non-fasting patient?
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 findings suggest:
Apolipoprotein A1 is the major component of which lipoprotein?
The lipoprotein that transports cholesterol away from the tissues is:
A fasting serum sample from an asymptomatic 43-year-old woman is examined visually and chemically with the results shown in this table:
|
test |
result |
|
Chemistry |
|
|
initial appearance of serum |
milky |
|
appearance of serum after overnight refrigeration |
cream layer over turbid serum |
|
triglyceride level |
2000 mg/dL (22.6 mmol/L) |
|
cholesterol level |
550 mg/dL (14.25 mmol/L) |
This sample contains predominantly:
Chylomicrons are present in which of the following dyslipidemias?
The function of the major lipid components of the very low-density lipoproteins (VLDL) is to transport:
Turbidity in serum suggests elevation of:
A lipemic serum is separated and frozen at -20C for assay at a later date. One week later, prior to performing an assay for triglycerides, the specimen should be:
As part of a hyperlipidemia screening program, the results shown in this table are obtained from a 25-year-old woman 6 hours after eating:
|
test |
result |
|
triglycerides |
260 mg/dL (2.86 mmol/L) |
|
cholesterol |
120 mg/dL (3.12 mmol/L) |
Which of the following is the best interpretation of these results?
Blood is collected in a serum separator tube on a patient who has been fasting since midnight. The time of collection is 7 AM. The laboratory test that should be recollected is:
Which of the following is the formula for calculating absorbance given the percent transmittance(%T) of a solution?
The substance that is measured to estimate the serum concentration of triglycerides by most methods is:
Which of the following methods for quantitation of high-density lipoprotein is most suited for clinical laboratory use?
Hemoglobin A1c represents:
The principle of the occult blood test depends upon the: