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MCQ’s Chapter 22 (Lab)

Some of Common Questions and Answers for Laboratory Technicians and Technologists.

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MCQs for MLT
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Questions 1051 to 1100

  1. In the formation of urine, the function of the glomerulus is 
    1. Re-absorption of water
    2. Secretion
    3. Simple filtration
    4. Selective re-absorption
  2. Which of the following is a strict anaerobe?
    1. Bacillus anthracis
    2. Nocardia asteroides
    3. Listeria monocytogenes
    4. Clostridium botulinum
  3. An elevated leukocyte count with increased numbers of neutrophilic granulocytes USUALLY indicates
    1. Infectious mononucleosis
    2. Allergic reaction
    3. Bacterial infection
    4. Viral infection
  4. Albumin, alpha1, alpha2, beta, and gamma globulin are electrophoretic fractions of 
    1. Serum protein
    2. Serum lipoprotein
    3. Amino acid
    4. Hemoglobin
  5. Unconjugated bilirubin is also known as
    1. Conjugated bilirubin
    2. Biliverdin
    3. Prehepatic bilirubin
    4. Total bilirubin
  6. Brilliant cresyl blue or new methylene blue are stains used for counting
    1. Malaria
    2. Reticulocytes
    3. Platelets
    4. Howell-Jolly bodies
  7. Dilute normal urine is usually
    1. Amber
    2. Dark yellow
    3. Pale yellow
    4. Reddish-yellow
  8. Supravital staining of red cells with a deficiency of G-6-PD will demonstrate the presence of 
    1. Howell-Jolly bodies
    2. Plasmodium species
    3. Heniz bodies
    4. Rubriblasts
  9. The light colored zone adjacent to the nucleus in a plasmacyte is the:
    1. Ribosome
    2. Chromatin
    3. Mitochondria
    4. Transferrin
  10. The majority of iron in a adult is found as a constituent of:
    1. Hemoglobin
    2. Hemosiderin
    3. Myoglobin
    4. Transferrin
  1. The main function of the hexose monophosphate shunt in the erythrocyte is to:
    1. Regulate the level of 2,3 dpg
    2. Provide reduced glutathione to prevent oxidation of hemoglobin
    3. Prevent the reductoin of heme iron
    4. Provide energy for membrane maintenance
  2. In order for hemoglobin to combine reversibly with oxygen the iron must be :
    1. Complexed with haptoglobin
    2. Freely circulating in the cytoplasm
    3. Attached to transferrin
    4. In the ferrous state
  3. In which of the following disease states are teardrop cells and abnormal platelets most characteristically seen?
    1. Hemolytic anemia
    2. Multiple myeloma
    3. G-6PD deficiency
    4. Myeloid metaplasia
  4. In the normal adult the spleen acts as a site for:
    1. Storage of red blood cells
    2. Production of red blood cells
    3. Synthesis of erythropoietin
    4. Removal of imperfect and aging cells
  5. After removal of red blood cells from the circulation hemoglobin is broken down into:
    1. Iron,porphyrin, and amino acids
    2. Iron, protoporphyrin, and globin
    3. Heme, protoporphyrin, and amino acids
    4. Heme, hemosiderin, and globin
  6. Heinz bodies are:
    1. Readily identified with polychrome stains
    2. Rarely found in glucose-6-phosphate dehydrogenase deficient erythrocytes
    3. Closely associated with spherocytes
    4. Denatureed hemoglobin inclusiond that are readily removed by the spleen
  7. Cells for the transport of O2 and CO2 are:
    1. Granulocytes
    2. Lymphocytes
    3. Erythrocytes
    4. Thrombocytes
  8. Erythropoietin acts to:
    1. Shorten the replication time of the granulocytes
    2. Stimulate RNA synthesis of erythroid cells
    3. Increase colony-stimulating factors produced by the B-lymphocytes
    4. Decrease the release of marrow reticulocytes
  9. What cell shape is most commonly associated with increased mchc?
    1. Tear drop cells
    2. Target cells
    3. Spherocytes
    4. Sickle cells
  10. Which of the following characteristics are common to hereditary spherocytosis, hereditary elliptocytosis, hereditary stomatocytosis, and paroxysmal nocturnal hemoglobinuria?
    1. Autosomal dominant inheritance
    2. Red cell membrane defects
    3. Positive direct antiglobulin test
    4. Measured platelet count
  11. The biuret reaction for the analysis of serum protein depends on the number of?
    1. Free amino acids
    2. Free carboxyl groups
    3. Peptide bonds
    4. Tyrosine residues
  12. Calcium concentration in the serum is regulated by?        
    1. Insulin
    2. Parathyroid hormone
    3. Thyroxin
    4. Vitamin C
  13. In the liver, bilirubin is converted to:    
    1. Urobilinogen
    2. Urobilin
    3. Bilirubin-albumin complex
    4. Bilirubin diglucuronide
  14. The osmolality of a urine or serum specimen is measured by a change in the?        
    1. Freezing point
    2. Sediment point
    3. Midpoint
    4. Osmotic pressure
  15. Which of the following steroids is an adrenal cortical hormone?        
    1. Angiotensinogen
    2. Corticosterone
    3. Progesterone
    4. Pregnanetriol
  16. Which two conditions can “physiologically” elevate serum alkaline phosphatase?    
    1. Rickets, hyperparathyroidism
    2. Obstructive jaundice
    3. Growth, third trimester of pregnancy
    4. Viral hepatitis, infectious mononucleosis
  17. During an elevation of adrenal function, a patient had plasma cortisol determination is the morning after awakening and in the evening. Laboratory results indicated that the morning value was higher than the evening concentration. This is indicative of?        
    1. A normal finding
    2. Cushing’s syndrome
    3. Addison’s disease
    4. Hypopituitarism
  18. In electrophoretic analysis, buffers?    
    1. Stabilize electrolytes
    2. Maintain basic PH
    3. Act as a carrier for ions
    4. Produce an effect on protein configuration
  19. The T3 resin uptake test is a measure of?  
    1. Circulating T3
    2. Binding capacity of thyroxine-binding globulin
    3. Total thyroxine-binding globulin
    4. Circulating T3
  20. Blood PCO2 may be measured by?      
    1. Direct colorimetric measurement of dissolved CO2
    2. Calculations of blood PH and total CO2 concentration
    3. Measurement of CO2-saturated hemoglobin
    4. Measurement of CO2 consumed at the cathode
  1. Which of the following serum constituents is unstable if a blood specimen is left standing at room temperature for 8 hours before processing?        
    1. Cholesterol
    2. Triglyceride
    3. Creatinine
    4. Glucose
  2. Total iron-binding capacity measures the serum iron transporting capacity of?      
    1. Hemoglobin
    2. Ceruloplasmin
    3. Transferrin
    4. Ferritin
  3. In a spectrophotometer, light of a specific wavelength can be isolated from white light with a(n)?
    1. Double beam
    2. Diffraction grating
    3. Aperture
    4. Slit
  4. Absorbance (A) of a solution may be converted to percent transmittance (%T) using the formula?          
    1. 1 + Log %T
    2. 2 + Log %T
    3. 1 – Log %T
    4. 2 – Log %T
  5. A condition in which erythrocyte protoporphyrin is increased is?        
    1. Acute intermittent porphyria
    2. Iron Deficiency anemia
    3. Porphyria cutanea tarda
    4. Acute porphyric attack
  6. The formula for calculating serum osmolaliity that incorporates a correction for the water content of plasma is?
    1. 2 Na x (Glucose/20) x (BUN/3)
    2. Na + (2 x Glucose/20) x (BUN/3)
    3. 2 Na + Glucose/20 + (BUN/3)
    4. 2 Na + Glucose/3 + (BUN/20)
  7. The first step to be taken when attempting to repair a piece of electronic equipment is?  
    1. Check all the electronic connections
    2. Reset all the printed circuit boards
    3. Turn the instrument off
    4. Replace all the fuses
  8. Most of the carbon dioxide present in the blood is in the form of?        
    1. Dissolve CO2
    2. Carbonate
    3. Bicarbonate ion
    4. Carbonic acid
  9. The statistical term for the average value is the?        
    1. Mode
    2. Median
    3. Mean
    4. Coefficient of variation
  10. An index of precision is statistically known as the?    
    1. Median
    2. Mean
    3. Standard deviation
    4. Coefficient of variation
  11. The most frequent value in a collection of data is statistically known as the?          
    1. Mode
    2. Median
    3. Mean
    4. Standard deviation
  12. The middle value of a data set is statistically known as the?        
    1. Mean
    2. Median
    3. Mode
    4. Standard deviation
  13. In a specimen collected for plasma glucose analysis, sodium floride?        
    1. Serves as a coenzyme of hexokinase
    2. Prevents reactivity of non-glucose reducing substances
    3. Precipitates proteins
    4. Inhibits glycolysis
  14. The serum that contributes to most serum osmolality is?        
    1. Glucose
    2. Sodium
    3. Chloride
    4. Urea
  15. Which family of steroid hormones is characterized by an unsaturated A ring?          
    1. Progestins
    2. Estrogens
    3. Androgens
    4. Glucocorticoids
  16. Which of the following serum protein fractions is most likely to be elevated in patients with nephrotic syndrome?      
    1. Alpha-1 globulin
    2. Alpha1- globulin and alpha-2 globulin
    3. Alpha-2 globulin and beta globulin
    4. Beta globulin and gamma globulin
  17. The following lab results were obtained from arterial blood: sodium           136 mEq/L pH                   7.32 Potassium     4.4 mEq/L PCO2             79 mm Hg Chloride         92 mEq/L Bicarbonate  40 mEq/L these results are compatible with?      
    1. Respiratory alkalosis
    2. Respiratory acidosis
    3. Metabolic alkalosis
    4. Metabolic acidosis
  18. Which of the following statements about fluorometry are true?    
    1. A compound is said to fluoresce when it absorbs light at one wavelength and emits light at a second wave length
    2. Detectors in fluorometers are placed 180 degrees from the excitation source
    3. It is less sensitive than spectrophotometry
    4. It avoids the necessity for complexing of components because fluorescence is a native property
  19. Two standard deviations is the acceptable limit of error in the chemistry laboratory. If you run the normal control 100 times, how many of the values wou;d be out of control due to random error?  
    1. 1
    2. 5
    3. 10
    4. 20
  20. Serum anion gap is increased in patients with?        
    1. Renal tubular acidosis
    2. Diabetic alkalosis
    3. Metabolic acidosis due to diarrhea
    4. Lactic acidosis

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