Specialty Certified Medical Assistant Laboratory Procedures and Diagnostics 1 — Questions and Answers
Question 1: What does the acronym 'CLIA' stand for in the context of medical laboratory regulations?
- Clinical Laboratory Improvement Amendments (Correct answer)
- Certified Laboratory Inspection Agency
- Clinical Licensing and Inspection Act
- Comprehensive Laboratory Information Assessment
Correct answer: Clinical Laboratory Improvement Amendments
CLIA (Clinical Laboratory Improvement Amendments) establishes quality standards for all laboratory testing in the US to ensure accurate, reliable results.
Question 2: Which type of microscopy is used to examine unstained specimens by varying the refractive index between the specimen and surrounding medium?
- Darkfield microscopy
- Phase-contrast microscopy (Correct answer)
- Fluorescence microscopy
- Electron microscopy
Correct answer: Phase-contrast microscopy
Phase-contrast microscopy enhances contrast in transparent specimens by exploiting differences in refractive index, making unstained living cells visible.
Question 3: A urine dipstick test shows positive nitrites. What does this finding most likely indicate?
- Kidney stones
- Bacterial infection in the urinary tract (Correct answer)
- Dehydration
- Glucose in the urine
Correct answer: Bacterial infection in the urinary tract
Positive nitrites on a urine dipstick indicate the presence of bacteria that convert urinary nitrates to nitrites, suggesting a urinary tract infection.
Question 4: What is the normal fasting blood glucose range for an adult?
- 40-69 mg/dL
- 70-99 mg/dL (Correct answer)
- 100-125 mg/dL
- 126-140 mg/dL
Correct answer: 70-99 mg/dL
Normal fasting blood glucose for an adult is 70-99 mg/dL; values of 100-125 mg/dL indicate prediabetes, and ≥126 mg/dL indicates diabetes.
Question 5: Which laboratory test measures the percentage of red blood cells in a blood sample?
- Hemoglobin
- Hematocrit (Correct answer)
- Mean corpuscular volume (MCV)
- Erythrocyte sedimentation rate (ESR)
Correct answer: Hematocrit
Hematocrit (HCT) measures the proportion of blood volume occupied by red blood cells, expressed as a percentage.
Question 6: What is the purpose of a quality control (QC) sample in laboratory testing?
- To calibrate laboratory equipment at the start of each shift
- To verify that test results are accurate and within acceptable ranges before patient results are reported (Correct answer)
- To clean reagents between specimen runs
- To serve as the negative control for infectious disease tests
Correct answer: To verify that test results are accurate and within acceptable ranges before patient results are reported
QC samples are tested alongside patient samples to confirm the accuracy and precision of the test system before results are released.
Specialty Certified Medical Assistant Laboratory Procedures and Diagnostics 1
What does the acronym 'CLIA' stand for in the context of medical laboratory regulations?