Quiz Answers
- A flagellate frequently found in the urine of female patients is
- a. Trichomonas tenax
- b. Trichomonas hominis
- c. Trichomonas vaginalis ✅
- d. Entamoeba coli
- Unconjugated bilirubin is also known as
- a. Biliverdin
- b. Total bilirubin
- c. Conjugated bilirubin
- d. Prehepatic bilirubin ✅
- According to Landsteiner, when a specific antigen is present on blood cells, the corresponding antibody
- a. May or may not be present depending on the agglutinogens present
- b. Is present in the serum
- c. Is present in the blood cells
- d. Is absent from the serum ✅
- A reactive fluorescent treponemal antibody (FTA-AB) test
- a. Indicates no infection
- b. Is positive during the chancre stage
- c. Confirms the presence of treponemal antibodies ✅
- d. Indicates the severity of infection
- The screening or presumptive test for the osmotic fragility of red cells is normal when hemolysis begins in
- a. 0.50% NaCl ✅
- b. 0.90% NaCl
- c. 1.34% NaCl
- d. 0.85% NaCl
- Most methods for the determination of blood creatinine are based on the reaction of creatinine and
- a. Sulfuric acid
- b. Alkaline picrate ✅
- c. Ammonium hydroxide
- d. Acetic anhydride
- Hansel’s stain is appropriate for
- a. Nasal secretion for eosinophiles ✅
- b. Circulating eosinophiles
- c. Phagocytic neutrophils
- d. Leukocytes in spinal fluid
- Brilliant cresyl blue or new methylene blue are stains used for counting
- a. Platelets
- b. Reticulocytes ✅
- c. Howell-Jolly bodies
- d. Malaria
- Supravital staining of red cells with a deficiency of G-6-PD will demonstrate the presence of
- a. Rubriblasts
- b. Howell-Jolly bodies
- c. Heinz bodies ✅
- d. Plasmodium species
- A donor who recently tested positive for HBsAg should be deferred
- a. For 5 years
- b. For 1 year
- c. For 6 months
- d. Permanently ✅
- The end-product of purine metabolism is
- a. Uric acid ✅
- b. Creatine
- c. Creatinine
- d. Urea
- Water-soluble pigments are produced by
- a. Yeasts
- b. Staphylococcus epidermidis
- c. Pseudomonas aeruginosa ✅
- d. Group A streptococcus
- Alkaline phosphatase is GREATLY elevated in
- a. Kidney disease
- b. Obstructive jaundice ✅
- c. Liver disease
- d. Myocardial infarction
- A floatation method for concentration of ova and cysts used
- a. Zinc chloride
- b. Concentrated formalin
- c. Ammonium sulfate
- d. Zinc sulfate ✅
- The organism that can cause rheumatic fever and/or glomerular nephritis is
- a. Staphylococcus aureus
- b. Staphylococcus haemolyticus
- c. Streptococcus pyogenes ✅
- d. Streptococcus viridans
- In the formation of urine, the function of the glomerulus is
- a. Secretion
- b. Re-absorption of water
- c. Selective re-absorption
- d. Simple filtration ✅
- Metabolic acidosis can be detected by testing urine for the presence of
- a. Protein
- b. Uric acid
- c. Glucose
- d. Ketone bodies ✅
- A substance that produces a prolonged prothrombin time when given orally is
- a. Protamine sulfate
- b. Coumadin ✅
- c. Heparin
- d. Saliclate
- Which one of the following is characteristic of any antigen?
- a. Produced by action of antibody
- b. High molecular weight
- c. Foreign to animal
- d. High order of specificity ✅
- A variety of media may be safely stored for months if care is taken to
- a. Retain their moisture ✅
- b. Avoid exposing them to light
- c. Maintain them at room temperature
- d. Maintain them in an incubator
- The ketone bodies include acetoacetic acid, acetone, and
- a. Acetic acid
- b. Oxaloacetic acid
- c. Lactic acid
- d. 3-hydroxy butyric acid ✅
- The accepted and usual time and temperature used for the inactivation of serum is
- a. 25 C for 1 hour
- b. 37 C for 30 min
- c. 56 C for 30 min ✅
- d. 56 C for 10 min
- When using white blood cell pipets for performing a white cell count, blood is diluted
- a. 1:200
- b. 1:10
- c. 1:50
- d. 1:20 ✅
- The degree that a procedure deviates from a known value or from a calculated mean value is known as
- a. Standard deviation ✅
- b. Coefficient variation
- c. Percent deviation
- d. Quality control
- Which of the following tests is specific for urinary glucose?
- a. Dip stick ✅
- b. Benedict’s
- c. Clinitest
- d. Pandy
- Dilute normal urine is usually
- a. Dark yellow
- b. Reddish-yellow
- c. Amber
- d. Pale yellow ✅
- The principle involved in some automated blood cell counters is based on the
- a. Amount of hemoglobin in the red cell
- b. Value of the cell indices
- c. Weight of the hemoglobin in the red cell
- d. Size of the particle being counted ✅
- All of the following influence glomerular filtration EXCEPT
- a. Hyperglycemia and renal tubule malfunction ✅
- b. Decreased renal blood flow and cardiac failure
- c. Renal or urinary calculi and decreased renal blood flow
- d. Cardiac failure and renal or urinary calculi
- To determine if a patient is A1 or A2, the blood is typed with
- a. Dolichos biflorus serum ✅
- b. Anti-A serum
- c. Anti-AB serum
- d. Anti-A2 serum
- Who is credited with processing the most readily acceptable theory of ABO inheritance?
- a. Levine
- b. Bernstein
- c. Weiner
- d. Landsteiner ✅
- On most automated cell counters, background counts are made using
- a. Lysing reagent only
- b. Diluting fluid ✅
- c. Distilled water
- d. Highly-diluted blood
- Blood group A individuals have
- a. Anti-B in their serum ✅
- b. Antigen A and B on their red cells
- c. Anti-A in their serum
- d. Anti-O in their serum
- The ketone test area on a dip stick is impregnated with
- a. Alkaline copper
- b. Ferric chloride
- c. 2,4 dichloraniline
- d. Nitroprusside ✅
- Which of the following tests is used to measure capillary fragility?
- a. Prothrombin time
- b. Bleeding time
- c. Partial thromboplastin time (PTT)
- d. Tourniquet ✅
- Most of the plasma thyroxine (T4) is
- a. Free
- b. Bound to cholesterol
- c. Bound to globulin ✅
- d. Bound to albumin
- The etiologic agent of chancroid is
- a. Haemophilus aegyptius
- b. Bordetella pertussis
- c. Haemophilus influenzae
- d. Haemophilus ducreyi ✅
- Which one of the following is a function of gamma globulin?
- a. Transports glucose
- b. Regulates body temperature
- c. Performs as fibrinogen for blood coagulation
- d. Provides humoral immunity ✅
- During the maturation of a blood cell, the nuclear chromatin pattern becomes
- a. Finer
- b. More acidic
- c. Less dense
- d. More dense ✅
- Cerebral spinal fluid patients with post-cerebral hemorrhage appears
- a. Light yellow or straw colored ✅
- b. Bright red
- c. Green
- d. Clear (colorless)
- Freezing point depression measurements are part of which one of the following urine test procedures?
- a. Hydrometry
- b. Refractive index
- c. Osmolality ✅
- d. Specific gravity
- The infective stage of the hookworm is the
- a. Rhabditiform larva with a short buccal cavity
- b. Filariform larva with a notched tail
- c. Filariform larva with a pointed tail ✅
- d. Rhabditiform larva with a long buccal cavity
- Enterobius vermicularis is a
- a. Hookworm
- b. Flat worm
- c. Filarial worm
- d. Pinworm ✅
- Sodium is responsible for the maintenance of
- a. Blood coagulation
- b. Osmotic pressure of body fluids ✅
- c. Cardiac muscle contractions
- d. Salt intake
- In Taenia saginata, the larval stage develops in
- a. Man
- b. Swine
- c. Fish
- d. Cattle ✅
- When performing automated cell counts, most automated cell counter instruments
- a. Count nucleated red blood cells with leukocytes ✅
- b. Do not count nucleated red blood cells
- c. Count nucleated red blood cells with erythrocytes
- d. Count nucleated red blood cells with platelets
- Antihuman serum globulin (Coombs) is NOT used in performing
- a. Reverse typing ✅
- b. Immunoglobulin testing
- c. D(u) testing
- d. Autoagglutination tests
- The mother of a 4-year-old child notes that her child is sleeping poorly and scratching his anal area. You suspect the child may have pinworms. Which one of the following is the BEST method to make that diagnosis?
- a. Examine the stool for the presence of trophozoites
- b. Determine the titer of IgE antibody against the organism
- c. Examine a blood smear for the presence of microfilaria
- d. Examine transparent adhesive tape for the presence of eggs ✅
- e. Examine the stool for the presence of cysts
- Larval stage of Taenia saginata is called
- a. hydatid cyst
- b. cysticercus cellulosae
- c. cysticercoid
- d. cysticercus bovis ✅
- A 4-year-old boy presents to his pediatrician with intense perianal itching. His mother explains that the child has also been extremely irritable during the day and has not been sleeping well at night. Eggs with a flattened side were identified by the laboratory technician from a piece of scotch tape brought in by the parent. Infection with which of the following organisms is most likely?
- a. Ascaris lumbricoides
- b. Entamoeba histolytica
- c. Echinococcus granulosus
- d. Trichuris trichiura
- e. Enterobius vermicularis ✅
- Four weeks after his arrival from Africa, a 24-year-old graduate student presents with blood in his urine. Microscopic examination of his urine reveals the presence of eggs with terminal spines. In the interview he admits that he has been working on his family’s rice field occasionally since his early childhood. The most likely etiologic agent of his complaint is
- a. Schistosoma japonicum
- b. Entamoeba histolytica
- c. Schistosoma haematobium ✅
- d. Fasciolopsis buski
- e. Schistosoma mansoni
