Assessement 2: Wbc Differential And Platelet Estimation
Questions and Answers
- 1.
While performing a WBC differential, 36 neutrophils are counted. If the total WBC count is 12,000 per microliter, what is the absolute count for neutrophils?
- A.
36%
- B.
64%
- C.
4,320 per microliter
- D.
432,000 per microliter
Correct Answer
C. 4,320 per microliterExplanation
The absolute count for neutrophils can be calculated by multiplying the percentage of neutrophils (36%) with the total WBC count (12,000 per microliter). This gives us 4,320 per microliter.Rate this question:
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- 2.
While performing a WBC differential count, 15 eosinophils are counted. If the total WBC count is 10,000 per microliter, what is the relative count for eosinophils?
- A.
15%
- B.
85%
- C.
1,500 per microliter
- D.
15,000 per microliter
Correct Answer
A. 15%Explanation
The relative count for eosinophils is 15%. This means that out of the total WBC count of 10,000 per microliter, 15% of them are eosinophils.Rate this question:
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- 3.
These leukocytes were observed during a WBC differential count of canine blood. They should be counted as:
- A.
Basophils
- B.
Eosinophils
- C.
Lymphocytes
- D.
Neutrophils
Correct Answer
D. NeutropHilsExplanation
The leukocytes observed during the WBC differential count of canine blood should be counted as neutrophils. Neutrophils are a type of white blood cell that are involved in the immune response and are responsible for phagocytosis of bacteria and other foreign substances. They have a multi-lobed nucleus and contain granules in their cytoplasm. In the given options, basophils, eosinophils, and lymphocytes are different types of white blood cells, but they have distinct morphological characteristics that differentiate them from neutrophils.Rate this question:
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- 4.
These two leukocytes were observed during a WBC differential count of canine blood. What are they?
- A.
An eosinophil and a basophil
- B.
A lymphocyte and a neutrophil
- C.
A neutrophil and a monocyte
- D.
A monocyte and an eosinophil
Correct Answer
C. A neutropHil and a monocyteExplanation
The correct answer is A neutrophil and a monocyte. During a WBC differential count, different types of leukocytes are observed and identified. Neutrophils are a type of white blood cell that are involved in the body's immune response and are responsible for fighting bacterial infections. Monocytes are another type of white blood cell that play a role in the immune response by engulfing and destroying pathogens. Therefore, the presence of a neutrophil and a monocyte indicates a normal immune response in the canine blood sample.Rate this question:
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- 5.
These leukocytes were observed during a WBC differential count of canine blood. They should be counted as:
- A.
Eosinophils
- B.
Lymphocytes
- C.
Monocytes
- D.
Neutrophils
Correct Answer
A. EosinopHilsExplanation
During a WBC differential count of canine blood, these leukocytes should be counted as eosinophils. Eosinophils are a type of white blood cell that play a role in the immune response against parasites and allergies. They are characterized by their granules that stain red with eosin dye. By identifying and counting the eosinophils, it helps in diagnosing and monitoring certain diseases and conditions in the dog's blood.Rate this question:
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- 6.
These leukocytes were observed during a WBC differential count on canine blood. They should be classified as:
- A.
Basophils
- B.
Eosinophils
- C.
Lymphocytes
- D.
Monocytes
Correct Answer
C. LympHocytesExplanation
The leukocytes observed during the WBC differential count on canine blood should be classified as lymphocytes.Rate this question:
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- 7.
These leukocytes were observed in canine blood during a WBC differential count. They should be classified as:
- A.
Basophils
- B.
Lymphocytes
- C.
Monocytes
- D.
Neutrophils
Correct Answer
A. BasopHilsExplanation
Basophils are a type of white blood cell that are involved in the immune response and play a role in allergic reactions. They are characterized by their large, dark-staining granules in the cytoplasm. Basophils are relatively rare in the blood, accounting for only a small percentage of white blood cells. In this case, the leukocytes observed in the canine blood sample were classified as basophils based on their characteristic appearance and staining properties.Rate this question:
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- 8.
During a platelet estimation, a technician counted the following numbers of platelets in each of 10 HPFs (1, 13, 15, 7, 0, 4, 4, 0, 18, 15). What is the estimated number of platelets per microliter of blood?
- A.
154,000
- B.
248,000
- C.
770,000
- D.
2,800,000
Correct Answer
A. 154,000Explanation
The estimated number of platelets per microliter of blood is 154,000. This is calculated by taking the average number of platelets counted in each HPF (High Power Field) and multiplying it by the total number of HPFs. In this case, the average number of platelets is (1+13+15+7+0+4+4+0+18+15)/10 = 7.7. Multiplying this by the total number of HPFs (10) gives us 77. Finally, we convert this to platelets per microliter by multiplying by a conversion factor of 2,000 (since there are 2,000 HPFs in a microliter). Therefore, the estimated number of platelets per microliter of blood is 77 x 2,000 = 154,000.Rate this question:
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- 9.
The technician has determined that the average number of platelets per HPF is 18. What is the estimated number of platelets per microliter of blood for this patient?
- A.
36,000
- B.
180,000
- C.
360,000
- D.
3,600,000
Correct Answer
C. 360,000Explanation
The technician has determined that the average number of platelets per high power field (HPF) is 18. To estimate the number of platelets per microliter of blood, we need to convert from HPF to microliter. Since the HPF area is known to be 0.1 mm² and the blood smear thickness is approximately 0.1 mm, the volume of blood in the HPF is 0.01 microliters. Dividing the average number of platelets per HPF (18) by the volume of blood in the HPF (0.01 microliters) gives us an estimated number of platelets per microliter of blood, which is 360,000.Rate this question:
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- 10.
What is the best way to describe these cells found during a canine blood film evaluation?
- A.
Basophils
- B.
Lymphocytes
- C.
Activated platelets
- D.
Staining error
Correct Answer
C. Activated plateletsExplanation
Activated platelets are the best way to describe these cells found during a canine blood film evaluation. Platelets are small, colorless cell fragments that play a crucial role in blood clotting. When platelets become activated, they undergo changes in shape and release various substances that aid in clot formation. In a blood film evaluation, activated platelets may be observed as irregularly shaped cells with granules or other signs of activation. This description accurately identifies the specific type of cells being referred to in the question.Rate this question:
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Mar 21, 2023Quiz Edited by
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Mar 29, 2014Quiz Created by
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