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Other Blood Groups
Macroscopic Examination of Urine
Enzymes
Primary Hemostasis
Gram Negative Bacteria
100

Name the phenomenon in which red cells from homozygous people possess more antigens per red cell than do cells from heterozygous people, exhibited by the corresponding antibodies reacting more strongly with cells from homozygous people

What is DOSAGE EFFECT?
100

Urine that is dark red or port wine in color may be caused by...

What are PORPHYRINS?
100

An enzymatic reaction in which the rate of reaction is independent of substrate concentration is said to be in:

What is ZERO ORDER KINETICS?
100

The anticoagulant of choice for most routine coagulation studies is:

What is SODIUM CITRATE?
100

Haemophilus influenzae will not routinely grow on blood agar due to a lack of which necessary factor?

What is V FACTOR/NAD?
200

Which Lewis phenotype is likely to be transiently expressed by a pregnant female and result in the development of Lewis antibodies?

What is Le(a-b-)?

200

The normal color of urine is due to which pigment?

What is UROCHROME?
200

Elevation of which isoenzyme of creatine kinase is indicative of myocardial infarction?

What is CK-MB?
200
What is the receptor that facilitates platelet adhesion to the exposed subendothelium?

What is Glycoprotein 1b?

200

A 17-year-old boy visits the emergency department with a painful genital ulcer and inguinal lymphadenopathy. A gram stain of the collected specimen shows gram negative bacilli in a “school of fish” formation. What is the presumptive identification of this organism?

What is HAEMOPHILUS DUCREYI?
300

The Duffy null phenotype seems to serve as a protective mechanism against infection with which organism?

What is Plasmodium vivax?

300
The presence of which two analytes can indicate that a liquid is definitely urine?
What are UREA and CREATININE?
300
An increase in serum amylase and lipase is indicative of dysfunction of which organ?
What is the PANCREAS?
300
What is the receptor that facilitates platelet aggregation by binding fibrinogen?
What is Glycoprotein IIb/IIIa?
300

The best TWO tests to differentiate Neisseria meningitidis from Moraxella catarrhalis would be:

What are sugar fermentation and nitrate reduction?

400
Which blood group's antibodies experience drastic fluctuations in titer, causing antibody testing to occasionally be negative, despite previously being positive?
What is the KIDD BLOOD GROUP?
400

A clear, red urine specimen is received into the laboratory that has a positive chemical test for blood. No intact red blood cells are seen upon microscopic examination. Which analyte is likely to be responsible for these results?

What is HEMOGLOBIN or MYOGLOBIN?
400
Elevations of serum ALT and AST are indicative of dysfunction in which organ?
What is the LIVER?
400
Gray platelet syndrome is characterized by a deficiency in...
What are ALPHA GRANULES?
400

A slender gram negative bacillus was seen on the gram stain of a wound culture from the hand of MMA fighter Ronda Rousey after a fight. Growth on blood and chocolate agar smells like bleach. The organism is motility negative, oxidase positive, and assachrolytic. What is the presumptive identification of this organism?

What is EIKENELLA CORRODENS?
500
Which antibody exhibits characteristic mixed field agglutination?
What is ANTI-LUa?
500
The density of a solution compared with the density of a similar volume of distilled water at a similar temperature is known as...
What is SPECIFIC GRAVITY?
500

Which enzyme catalyzes the reversible oxidation of lactate to pyruvate?

What is LACTATE DEHYDROGENASE?
500

The following results are consistent with which disorder of primary hemostasis?

Normal platelet aggregation to collagen, ADP, and epinephrine; decreased agglutination with Ristocetin that is not corrected by the addition of von Willebrand factor

What is BERNARD SOULIERS?
500
What TWO characteristics could be used to differentiate Pasteurella multocida from Haemophilus influenzae?
What are GROWTH ON BLOOD AGAR and CO2 REQUIREMENTS FOR GROWTH?