What does hematoxylin primarily stain in tissue sections?
Anonymous Quiz
15%
A) Cytoplasmic proteins
79%
B) Nucleic acids (basophilic nuclei)
5%
C) Collagen fibers
2%
D) Lipids
Which of the following is most likely associated with a positive nitrite dipstick result?
Anonymous Quiz
7%
A) Leukocyte esterase
15%
B) Urobilinogen
74%
C) Bacteriuria due to Gram-negative organisms
5%
D) Proteinuria
Which type of problem usually explains an ABO typing discrepancy due to cold-reactive antibodies?
Anonymous Quiz
3%
A) Secretor status
24%
B) Rouleaux interference
56%
C) Cold agglutinins (IgM)
17%
D) Hemolytic disease of the newborn
Which of the following is a key step in maintaining pipette accuracy?
Anonymous Quiz
21%
A) Calibration with water at room temperature
59%
B) Regular adjustment of the display to the measured value
3%
C) Using a rubber tip only
17%
D) Measuring volume at the instrument's maximum range only
What information is primarily found on a Safety Data Sheet (SDS) for a chemical?
Anonymous Quiz
2%
A) Tax classification
93%
B) Handling, exposure controls, and emergency measures
5%
C) Supplier's marketing details
0%
D) Temperature coefficients
A patient presents with MCV 105 fL, normal MCHC, and elevated RDW. This pattern is most consistent with:
Anonymous Quiz
59%
A) Macrocytic anemia
28%
B) Microcytic anemia
10%
C) Normocytic anemia
3%
D) Hypochromic anemia
Which lipid parameter is most dependent on fasting state for accurate measurement?
Anonymous Quiz
8%
A) HDL cholesterol
66%
B) LDL cholesterol calculated from triglycerides
19%
C) Triglycerides
7%
D) Total cholesterol
Which organism is typically oxidase positive?
Anonymous Quiz
25%
A) Escherichia coli
46%
B) Streptococcus pyogenes
23%
C) Neisseria meningitidis
5%
D) Listeria monocytogenes
Which antibody isotype is primarily responsible for mucosal immunity?
Anonymous Quiz
2%
A) IgG
76%
B) IgA
20%
C) IgM
2%
D) IgE
Which fixative is commonly used for Pap smear slide preservation?
Anonymous Quiz
21%
A) Formalin
67%
B) Ethanol-based fixative
10%
C) Methanol
3%
D) Glutaraldehyde
Which finding in urine sediment is most specific for glomerular disease?
Anonymous Quiz
31%
A) Erythrocyte casts
5%
B) Bacteria
55%
C) Calcium oxalate crystals
10%
D) Uric acid crystals
Which antibody is commonly implicated in hemolytic disease of the fetus and newborn due to the Rh(D) antigen?
Anonymous Quiz
8%
A) Anti-A
13%
B) Anti-B
77%
C) Anti-D (Rh)
2%
D) Anti-Kell
What is the primary purpose of Westgard rules in internal quality control?
Anonymous Quiz
5%
A) To set unit conversion factors
85%
B) To identify outside the control limits and false rejection/acceptance
8%
C) To calibrate instruments
2%
D) To schedule maintenance
Which biosafety level requires work with human blood in risk group 2 agents, use of Class II biological safety cabinet, and restricted access?
Anonymous Quiz
10%
A) BSL-1
66%
B) BSL-2
19%
C) BSL-3
5%
D) BSL-4
❤1
Which test assesses platelet function rather than platelet number?
Anonymous Quiz
6%
A) CBC
85%
B) Platelet aggregation studies
8%
C) PT
2%
D) aPTT
Which parameter indicates the average volume of a red blood cell?
Anonymous Quiz
60%
A) MCV
12%
B) MCH
16%
C) MCHC
12%
D) RDW
A reticulocyte count is used to assess bone marrow response in anemia. If the reticulocyte percentage is elevated with anemia, which scenario is most likely?
Anonymous Quiz
6%
A) Decreased production
11%
B) Ineffective erythropoiesis
76%
C) Adequate marrow response with blood loss or hemolysis
6%
D) Iron deficiency
ALT is typically more liver-specific than AST. Which statement is true?
Anonymous Quiz
22%
A) AST higher in alcoholic liver disease
27%
B) ALT higher in alcoholic liver disease
51%
C) AST/ALT ratio > 2 indicates alcoholic liver disease
0%
D) ALT is not a transaminase
Which morphology and Gram reaction are typical for Staphylococcus aureus?
Anonymous Quiz
23%
A) Gram-positive cocci in chains
13%
B) Gram-negative diplococci
58%
C) Gram-positive cocci in clusters
6%
D) Gram-positive rods
In an indirect ELISA, what is the role of the secondary antibody?
Anonymous Quiz
17%
A) Binding antigen
44%
B) Detecting human antibodies
22%
C) Blocking non-specific sites
16%
D) Enzymatic substrate