MLS 203 Final Study Guide A++ Graded Top Tier
Questions and Their Correctly Answered Questions
2..5 pts
Correct the following refractometer reading of a urine specimen with a glucose concentration of
2.0 g/dL and a specific gravity of 1.033. - CORRECT ANSWER ✔✔ -1.025
A 1 to 10 dilution must be performed. How much sample must be used? - CORRECT ANSWER
✔✔ -1 part sample
A 1 to 2, fourfold serial dilution was performed. The original concentration of the analyte was
1200 µg/dL. What is the concentration of the analyte in the final tube? - CORRECT ANSWER
✔✔ -75 g
A 1 to 20 dilution was performed using 190 µL of diluent. What is the sample volume? -
CORRECT ANSWER ✔✔ -10 L
A 1 to 5 dilution was performed. The total volume was 250 µL, and the diluent volume was 200
µL. What is the sample volume? - CORRECT ANSWER ✔✔ -50 L
A medical laboratory technician calculated the following values for a glucose assay: mean value
of 110.5 mg/dL and 1 SD = 1.7. Which of the following values is out +/- 2 SD but within +/- 3
SD? - CORRECT ANSWER ✔✔ -107.8 mg/dL
A medical laboratory technician student had to calculate the +/- 3 SD range for a level 3
hemoglobin control. The mean value was 22.4 g/dL, and the standard deviation value was 1.2.
What is the +/- 3 SD range? - CORRECT ANSWER ✔✔ -18.8 to 26.0 g/dL
, A negative exponent in the denominator remains a negative exponent when it is inverted to the
numerator. - CORRECT ANSWER ✔✔ -false
A patient developed two antibodies to antigens on red blood cells. What percentage of blood
donors would be compatible with this patient if the prevalence of the first antigen is found in two
of three donors, and the prevalence of the second antigen is found in one of four donors. -
CORRECT ANSWER ✔✔ -25%
A patient with a history of spontaneous bleeding and bruising has an increased partial
thromboplastin time. The patient receives 4 units of fresh-frozen plasma. What effect will the
transfusion have on his clotting ability? - CORRECT ANSWER ✔✔ -The partial thromboplastin
time should decrease by 30% to 40%.
A patient with a platelet count of 75,000/μL received six pooled platelet concentrates. What
effect will this have on the patient's platelet count? - CORRECT ANSWER ✔✔ -The platelet
concentration should rise to approximately 135,000/μL.
A reticulocyte count was performed and 33 reticulocytes were counted per 1000 erythrocytes.
What is the reticulocyte count? - CORRECT ANSWER ✔✔ -3.3%
A reticulocyte count was performed, and 22 reticulocytes were counted per 1000 RBCs. What is
the reticulocyte percentage? - CORRECT ANSWER ✔✔ -2.2%
A shift in quality control results is - CORRECT ANSWER ✔✔ -an abrupt change in the pattern
of quality control values.
Questions and Their Correctly Answered Questions
2..5 pts
Correct the following refractometer reading of a urine specimen with a glucose concentration of
2.0 g/dL and a specific gravity of 1.033. - CORRECT ANSWER ✔✔ -1.025
A 1 to 10 dilution must be performed. How much sample must be used? - CORRECT ANSWER
✔✔ -1 part sample
A 1 to 2, fourfold serial dilution was performed. The original concentration of the analyte was
1200 µg/dL. What is the concentration of the analyte in the final tube? - CORRECT ANSWER
✔✔ -75 g
A 1 to 20 dilution was performed using 190 µL of diluent. What is the sample volume? -
CORRECT ANSWER ✔✔ -10 L
A 1 to 5 dilution was performed. The total volume was 250 µL, and the diluent volume was 200
µL. What is the sample volume? - CORRECT ANSWER ✔✔ -50 L
A medical laboratory technician calculated the following values for a glucose assay: mean value
of 110.5 mg/dL and 1 SD = 1.7. Which of the following values is out +/- 2 SD but within +/- 3
SD? - CORRECT ANSWER ✔✔ -107.8 mg/dL
A medical laboratory technician student had to calculate the +/- 3 SD range for a level 3
hemoglobin control. The mean value was 22.4 g/dL, and the standard deviation value was 1.2.
What is the +/- 3 SD range? - CORRECT ANSWER ✔✔ -18.8 to 26.0 g/dL
, A negative exponent in the denominator remains a negative exponent when it is inverted to the
numerator. - CORRECT ANSWER ✔✔ -false
A patient developed two antibodies to antigens on red blood cells. What percentage of blood
donors would be compatible with this patient if the prevalence of the first antigen is found in two
of three donors, and the prevalence of the second antigen is found in one of four donors. -
CORRECT ANSWER ✔✔ -25%
A patient with a history of spontaneous bleeding and bruising has an increased partial
thromboplastin time. The patient receives 4 units of fresh-frozen plasma. What effect will the
transfusion have on his clotting ability? - CORRECT ANSWER ✔✔ -The partial thromboplastin
time should decrease by 30% to 40%.
A patient with a platelet count of 75,000/μL received six pooled platelet concentrates. What
effect will this have on the patient's platelet count? - CORRECT ANSWER ✔✔ -The platelet
concentration should rise to approximately 135,000/μL.
A reticulocyte count was performed and 33 reticulocytes were counted per 1000 erythrocytes.
What is the reticulocyte count? - CORRECT ANSWER ✔✔ -3.3%
A reticulocyte count was performed, and 22 reticulocytes were counted per 1000 RBCs. What is
the reticulocyte percentage? - CORRECT ANSWER ✔✔ -2.2%
A shift in quality control results is - CORRECT ANSWER ✔✔ -an abrupt change in the pattern
of quality control values.
