Quiz on Hemocytometer and Erythrocyte Count

What is the primary use of a hemocytometer?

• To analyze blood chemistry

• To measure blood pressure

• To determine blood type

• To count blood cells

Which of the following is NOT a reason to use a hemocytometer?

• Automated cell counters are unavailable

• Blood cell counts are extremely low

• To measure blood glucose levels

• To count cells in body fluids

What is the depth of the scales on a Neubauer slide?

• 0.05 mm

• 0.1 mm

• 0.2 mm

• 0.3 mm

What color bead is found on an RBC pipette?

• Red

• White

• Blue

• Green

What is the dilution factor when using a Thoma pipette for RBC counting?

• 1:400

• 1:200

• 1:100

• 1:300

What is the area of the smallest square on the grid of a hemocytometer?

• 0.001 mm²

• 0.0025 mm²

• 0.005 mm²

• 0.01 mm²

Which solution is NOT mentioned as a diluting fluid for RBC counting?

• Isotonic saline

• Hayam’s solution

• Gower’s solution

• Sodium bicarbonate solution

What is the normal range of erythrocytes for males?

• 6.0 – 7.0 x 10^6/μL

• 5.5 – 6.5 x 10^6/μL

• 4.2 – 5.4 x 10^6/μL

• 3.6 – 5.0 x 10^6/μL

What should be done to the Neubauer chamber before use?

• Heat to sterilize

• Clean with 70% ethanol

• Soak in water

• Rinse with saline

Which pipette has a larger bulb?

• Neither has a bulb

• Both are the same

• WBC pipette

• RBC pipette