Question 1

Standards and calibrators differ from control materials because:

Accepted Answer

Standards and calibrators contain an exact, known amount of analyte, which is used to calibrate instruments and ensure accurate measurements, unlike control materials which are used to verify the accuracy and precision of the test.

Question 2

Proper mixing of samples and timely delivery of samples to the laboratory are both examples of:

Accepted Answer

Proper mixing of samples and timely delivery of samples to the laboratory are considered preanalytic variables because they are factors that can influence the outcome of laboratory tests before the analysis actually takes place.

Question 3

Which of the following is the definition of a reference interval?

Accepted Answer

Reference intervals are values established for a particular analyte, given a method, instrument, or patient population, used to interpret individual test results.

Question 4

When viewing a slide with the 50$\times$ objective lens, the total magnification being used is:

Accepted Answer

The total magnification is calculated by multiplying the magnification of the objective lens by the magnification of the eyepiece lens. If the objective lens is 50x and the standard eyepiece lens is typically 10x, then the total magnification would be 50x * 10x = 500x.

Question 5

Tube length when referring to the microscope is the:

Accepted Answer

The tube length of a microscope refers to the distance between the eyepiece (ocular lens) and the objective lens. This distance is crucial for proper focusing and magnification of the specimen being observed.

Question 6

Standard deviation is a measurement of precision.

Accepted Answer

The answer of Standard deviation is a measurement of precision....

Question 7

Which of the following is involved in the study of hematology and used to determine sickness and health?

Accepted Answer

Hematology involves the study of blood, including the quantity of cells, their structure, and their function, to determine the state of an individual's health or sickness.

Question 8

A normal distribution curve will have 99.7% of the measured values fall within 2 SDs.

Accepted Answer

A normal distribution curve will have approximately 99.7% of the measured values fall within 3 standard deviations (SDs) from the mean, not 2 SDs.

Question 9

Accuracy is a measurement of the true value of an analyte.

Accepted Answer

Accuracy refers to how close a measured value is to the true value of the analyte, indicating the correctness of a measurement.

Question 10

The average of a group of data points is defined as the:

Accepted Answer

The average of a group of data points is defined as the mean, which is calculated by summing all the data points and then dividing by the number of data points.

Question 11

When hand washing after a patient contact, the soap application process should last at least:

Accepted Answer

The answer of When hand washing after a patient contact,...

Question 12

Delta checks are used in the hematology laboratory to:

Accepted Answer

Delta checks compare a patient's current test results with their previous results to identify significant changes that could indicate an error or a significant change in the patient's condition.

Question 13

Which of the following is not considered a postanalytic variable?

Accepted Answer

Proper anticoagulant used is considered a preanalytical variable, as it involves a step that occurs before the analysis of the specimen.

Question 14

A delta check is a historical reference on samples run in the laboratories.Once a sample fails a delta check, the most obvious corrective action is to:

Accepted Answer

Verifying the identification of the patient sample is the most immediate and crucial step to take once a sample fails a delta check. This ensures that the sample indeed belongs to the patient in question and helps rule out identification errors as the cause of the discrepancy.

Question 15

Error analysis, standard protocols, and turnaround time are all part of the:

Accepted Answer

Quality assurance systems encompass error analysis, standard protocols, and turnaround time to ensure the overall quality and reliability of processes.

Question 16

Safety training is part of new employee training in health care and includes:

Accepted Answer

Safety training for new employees in healthcare encompasses a wide range of topics, including biological hazards (such as exposure to infectious diseases), chemical hazards (such as exposure to toxic substances or medications), and environmental hazards (such as slips, trips, and falls or ergonomic issues). Therefore, all of the options listed are correct.

Question 17

Which of the following represents an example of a safety violation in the laboratory?

Accepted Answer

All the options listed (application of cosmetics, mouth pipetting, and consuming bottled water) represent safety violations in a laboratory setting. These actions can introduce contaminants, pose ingestion hazards, or lead to exposure to harmful substances.

Question 18

Which of the following behaviors is a violation of standard precautions?

Accepted Answer

Standard precautions include measures to prevent the spread of infection, such as hand hygiene and the use of personal protective equipment (PPE) like gloves, gowns, and face protection. Placing laboratory notebooks or other personal items on laboratory work areas can potentially contaminate these items with infectious agents, violating the principle of maintaining a clean and safe work environment.

Question 19

What is the most useful corrective action for the microscope when fine details cannot be visualized in immature cells?

Accepted Answer

Opening up the diaphragm increases the amount of light passing through the specimen, enhancing the visibility of fine details in immature cells.

Quiz 1: Introduction to Hematology and Basic Laboratory Practice

Standards and calibrators differ from control materials because:

Proper mixing of samples and timely delivery of samples to the laboratory are both examples of:

Which of the following is the definition of a reference interval?

When viewing a slide with the 50 $\times$ objective lens, the total magnification being used is:

Tube length when referring to the microscope is the:

Standard deviation is a measurement of precision.

Which of the following is involved in the study of hematology and used to determine sickness and health?

A normal distribution curve will have 99.7% of the measured values fall within 2 SDs.

Accuracy is a measurement of the true value of an analyte.

The average of a group of data points is defined as the:

When hand washing after a patient contact, the soap application process should last at least:

Delta checks are used in the hematology laboratory to:

Which of the following is not considered a postanalytic variable?

A delta check is a historical reference on samples run in the laboratories.Once a sample fails a delta check, the most obvious corrective action is to:

Error analysis, standard protocols, and turnaround time are all part of the:

Safety training is part of new employee training in health care and includes:

Which of the following represents an example of a safety violation in the laboratory?

Which of the following behaviors is a violation of standard precautions?

What is the most useful corrective action for the microscope when fine details cannot be visualized in immature cells?

Quiz 1: Introduction to Hematology and Basic Laboratory Practice

Standards and calibrators differ from control materials because:

Proper mixing of samples and timely delivery of samples to the laboratory are both examples of:

Which of the following is the definition of a reference interval?

When viewing a slide with the 50 ×\times× objective lens, the total magnification being used is:

Tube length when referring to the microscope is the:

Standard deviation is a measurement of precision.

Which of the following is involved in the study of hematology and used to determine sickness and health?

A normal distribution curve will have 99.7% of the measured values fall within 2 SDs.

Accuracy is a measurement of the true value of an analyte.

The average of a group of data points is defined as the:

When hand washing after a patient contact, the soap application process should last at least:

Delta checks are used in the hematology laboratory to:

Which of the following is not considered a postanalytic variable?

A delta check is a historical reference on samples run in the laboratories.Once a sample fails a delta check, the most obvious corrective action is to:

Error analysis, standard protocols, and turnaround time are all part of the:

Safety training is part of new employee training in health care and includes:

Which of the following represents an example of a safety violation in the laboratory?

Which of the following behaviors is a violation of standard precautions?

What is the most useful corrective action for the microscope when fine details cannot be visualized in immature cells?

When viewing a slide with the 50 $\times$ objective lens, the total magnification being used is: