Hematology
Variation in red cell size observed on the peripheral smear is described as:
A) Anisocytosis
B) Hypochromia
C) Poikilocytosis
D) Pleocytosis
A) Anisocytosis
There are two types of gram-positive bacterium that produce toxin leading to food poisoning. Which of the following below is naturally present in soil?
A) Clostridium perfringens
B) Bacillus cereus
C) Staphylococcus aureus
D) Clostridium difficile
B) Bacillus cereus
Vitamin B1 is also known as:
A) Cobalamin
B) Riboflavin
C) Thiamin
D) Pyridoxine
C) Thiamin
The optimum storage temperature for Red Blood Cells is:
A) -80 ˚C
B) -20 ˚C
C) -12 ˚C
D) 4 ˚C
D) 4 ˚C
Red Blood Cells are stored at 1-6 ˚C.
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called ________.
A) diapedesis
B) chemotaxis
C) margination
D) phagocytosis
B) chemotaxis
Mean cell volume (MCV) is calculated using the following formula:
A) (Hgb / RBC) × 10
B) (Hct / RBC) × 10
C) (Hct / Hgb) × 100
D) (Hgb / RBC) × 100
B) (Hct / RBC) × 10
Mean corpuscular volume (MCV) is the average volume of red cells. Unit = fL
What is the causative agent for gastritis and gastric ulcers?
A) Paramyxovirus
B) Mycobacterium tuberculosis
C) Helicobacter pylori
D) Pseudomonas aeruginosa
C) Helicobacter pylori
All the following amino acids are aromatic, except:
A) Tyrosine
B) Phenylalanine
C) Tryptophan
D) Valine
D) Valine
Which of the following is the correct storage temperature for the component listed?
A) Cryoprecipitated AHF, 4 ˚C
B) Fresh Frozen Plasma (FFP), -20 ˚C
C) Red Blood Cells, Frozen, -40 ˚C
D) Platelets, 37 ˚C
B) Fresh Frozen Plasma (FFP), -20 ˚C
Patients with Waldenstrom's macroglobulinemia demonstrate excessively increased concentrations of which of the following?
A) IgG
B) IgM
C) IgA
D) IgE
B) IgM
Which of the following erythrocyte inclusions can be visualized with supravital stain but cannot be detected on a Wright's-stained blood smear?
A) Basophilic stippling
B) Siderotic granules
C) Howell-Jolly bodies
D) Heinz bodies
D) Heinz bodies
A supravital stain, such as brilliant green, crystal violet, or new methylene blue is necessary for Heinz bodies to be observed.
What gram negative bacteria is also facultative anerobic, non-spore forming, and is genetically closely related to E. Coli?
A) Salmonella
B) Shigella
C) Shiga Toxin Producing E.coli
D) Campylobacter
B) Shigella
Vitamin D helps the body regulate & absorb _______ .
A) Magnesium
B) Calcium
C) Zinc
D) Iron
B) Calcium
Cryoprecipitated AHF must be transfused within what period of time following thawing and pooling?
A) 4 hours
B) 8 hours
C) 12 hours
D) 24 hours
A) 4 hours
The antigen marker most closely associated with transmission of HBV infections is:
A) HBsAg
B) HBiAg
C) HBcAg
D) HBeAg
D) HBeAg (Hepatitis B e-antigen)
When three of the four alpha genes are deleted, what is the disorder known as?
A) Hemoglobin H disease
B) β-thalassemia
C) α-thalassemia
D) Hydrops fetalis
A) Hemoglobin H disease
A woman with a history of UTI's comes to the ER with burning on urination along with frequency and urgency. She says her urine smells like ammonia. The cause of her UTI is likely to be
A) Enterobacter aerogenes
B) Proteus mirabilis
C) Citrobacter freundii
D) E. coli
E) Serratia marcescens
B) Proteus mirabilis
The vitamin needed for regulation of calcium metabolism is ____.
A) Vitamin A
B) Vitamin C
C) Vitamin E
D) Vitamin D
E) Folate
D) Vitamin D
Irradiation of a unit of Red Blood Cells is done to prevent the replication of donor:
A) Granulocytes
B) Lymphocytes
C) Red cells
D) Platelets
B) Lymphocytes
Irradiation inhibits proliferation of T lymphocytes.
Asthma is an example of a _____________ hypersensitivity reaction.
A) Type I
B) Type II
C) Type III
D) Type IV
A) Type I (reaction mediated by IgE antibodies)
What type of globin chains and hemoglobin are characteristics of severe α thalassemia?
A) Two α chains and two β chains (HbA)
B) Two α chains and two δ chains (HbA2)
C) Four β chains (HbH) or four γ chains (Hb Bart's)
D) Two α chains and two γ chains (HbF)
C) Four β chains (HbH) or four γ chains (Hb Bart's)
An 18 year old woman in rural Bangladesh develops profuse diarrhea. She has no symptoms other than the diarrhea and the manifestations of the fluid and electrolyte loss caused by the diarrhea. The most likely cause of her diarrhea is
A) Campylobacter jejuni
B) Enterotoxigenic E. coli
C) Salmonella typhimurium
D) Vibrio cholerae
E) Shigella dysenteriae
D) Vibrio cholerae
Which of the following is a precursor to serotonin?
A) Tyrosine
B) Phenylalanine
C) Tryptophan
D) a & b
E) b & c
C) Tryptophan
What is the second most immunogenic antigen?
A) C
B) c
C) E
D) K
D) K (Kell)
Hemolytic disease of the newborn is an example of a ____________ hypersensitivity reaction.
A) Type I
B) Type II
C) Type III
D) Type IV
B) Type II (cytotoxic reaction mediated by IgG or IgM antibodies)