Hemocytometer MCQ Quiz Questions And Answers

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Questions: 10 | Attempts: 5,930 | Updated: Jul 23, 2023

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Do you know about the functionality of the hemocytometer? To test your knowledge on this, you can take this hemocytometer quiz. Hemocytometer plays a vital role when it comes to human biology. If you believe you know everything about this term, this test will be an add-on to your knowledge. You can practice here; even if you miss out on something, we will help you with the answers. All the best! Hope you get a perfect score on this quiz.

Questions and Answers

1.

A hemocytometer is a special counting chamber designed for counting _______.
- A.
  
  Bones
- B.
  
  Blood cells
- C.
  
  Nerves
- D.
  
  Pulse rate
Correct Answer
B. Blood cells

Explanation
A hemocytometer is a specially designed counting chamber used for counting blood cells. It is commonly used in laboratories and medical settings to determine the number of red blood cells, white blood cells, and platelets present in a given sample. This tool allows for accurate and precise cell counting, which is crucial in diagnosing and monitoring various blood-related conditions such as anemia, infections, and leukemia.

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2.

What is the rule used when counting cells in a hemocytometer?
- A.
  
  North East Rule
- B.
  
  Counting Rule
- C.
  
  South West Rule
- D.
  
  North West Rule
Correct Answer
D. North West Rule

Explanation
The North West Rule is used when counting cells in a hemocytometer. This rule involves counting the cells that are present in the four corner squares of the hemocytometer grid. It is a commonly used method for cell counting in laboratory settings.

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3.

What squares are used when counting red blood cells?
- A.
  
  The corner squares
- B.
  
  The middle top square and middle bottom square
- C.
  
  The 3 squares on the left and the 3 squares on the right
- D.
  
  The middle square
Correct Answer
D. The middle square

Explanation
The question is asking which squares are used when counting red blood cells. The correct answer is the middle square. This suggests that when counting red blood cells, only the middle square is considered.

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4.

What is the dilution factor for red blood cells?
- A.
  
  1:300
- B.
  
  1:200
- C.
  
  1:100
- D.
  
  1:50
Correct Answer
B. 1:200

Explanation
The dilution factor for red blood cells is 1:200. This means that one part of the red blood cells is diluted with 200 parts of a diluent.

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1
1
5.

What is the volume of one triple-lined square?
- A.
  
  0.02mm³
- B.
  
  0.002mm³
- C.
  
  0.004mm³
- D.
  
  0.04mm³
Correct Answer
C. 0.004mm³

Explanation
The volume of one triple-lined square is 0.004mm³.

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6.

What is the dilution factor for white blood cells?
- A.
  
  1:100
- B.
  
  1:50
- C.
  
  1:20
- D.
  
  1:10
Correct Answer
C. 1:20

Explanation
The dilution factor for white blood cells is 1:20. This means that the sample is diluted 20 times before analysis. Dilution is often done to reduce the concentration of a substance in a sample, making it easier to work with or analyze. In this case, the white blood cells are being diluted to a ratio of 1 part sample to 20 parts diluent.

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7.

Where are white blood cells counted?
- A.
  
  The middle square
- B.
  
  The 3 left squares and 3 right squares
- C.
  
  The squares in the corners
- D.
  
  The 3 top squares and 3 bottom squares
Correct Answer
C. The squares in the corners

Explanation
White blood cells are counted in the squares in the corners. This is because the corners of the grid are less likely to have overlapping cells, allowing for a more accurate count. Additionally, counting the cells in the corners ensures that all areas of the grid are accounted for, providing a comprehensive assessment of the white blood cell count.

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8.

Why are several squares on the hemocytometer counted rather than just one?
- A.
  
  It is more representative.
- B.
  
  It is more fair.
- C.
  
  It makes the results more reliable.
- D.
  
  It is more valid.
Correct Answer
A. It is more representative.

Explanation
Counting several squares on the hemocytometer is more representative because it allows for a larger sample size. By counting multiple squares, the results can better reflect the overall concentration of cells in the sample. This reduces the likelihood of obtaining skewed or inaccurate results that may occur if only one square is counted. Therefore, counting several squares provides a more comprehensive and reliable assessment of the cell concentration in the sample.

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9.

When counting white blood cells, what is the volume of each square?
- A.
  
  0.02mm³
- B.
  
  0.01mm³
- C.
  
  0.2mm³
- D.
  
  0.1mm³
Correct Answer
D. 0.1mm³

Explanation
The volume of each square when counting white blood cells is 0.1mm³.

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10.

Hemoglobin takes up what number of molecules of oxygen?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
Correct Answer
D. 4

Explanation
Hemoglobin takes up four molecules of oxygen.

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Current Version
Jul 23, 2023

Quiz Edited by
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Oct 28, 2011

Quiz Created by
Nuzzzzie

Hemocytometer MCQ Quiz Questions And Answers

A hemocytometer is a special counting chamber designed for counting _______.

What is the rule used when counting cells in a hemocytometer?

What squares are used when counting red blood cells?

What is the dilution factor for red blood cells?

What is the volume of one triple-lined square?

What is the dilution factor for white blood cells?

Where are white blood cells counted?

Why are several squares on the hemocytometer counted rather than just one?

When counting white blood cells, what is the volume of each square?

Hemoglobin takes up what number of molecules of oxygen?