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Questions and Answers
What is the normal range for erythrocytes (RBC) in women?
3.9 to 5.5 million per microliter (μL, or mm3)
What is the normal range for erythrocytes (RBC) in men?
4.1-6.0 million/μL
How long is the average lifespan of erythrocytes (RBC)?
120 days
Which of the following are Granulocytes? (Select all that apply)
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What is the function of Neutrophils?
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What is the percentage range of Neutrophils in blood?
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How long do Neutrophils survive in blood?
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How long do Neutrophils survive in connective tissues?
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What is the function of Eosinophils?
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What percentage of blood leukocytes do Basophils represent?
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What is the function of Lymphocytes?
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What is the average lifespan of Platelets/Thrombocytes?
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Study Notes
Whole Blood Composition
- Blood cells consist of three main components: erythrocytes (RBC), leukocytes (WBC), and thrombocytes (platelets)
Erythrocytes (RBC)
- 3.9 to 5.5 million per microliter (μL) in women
- 4.1-6.0 million/μL in men
- Average lifespan of 120 days
Leukocytes (WBC)
- Consist of two main types: granulocytes and agranulocytes
Granulocytes
- Neutrophils
- 54% to 62% of WBC
- Active phagocytes that engulf bacteria
- Half-life of 6 to 8 hours in blood, 1 to 4 days in connective tissues
- Eosinophils
- 1% of blood leukocytes
- Basophils
- Rare type of WBC
Agranulocytes
- Lymphocytes
- Important for defenses against invading microorganisms, parasites, and abnormal cells
- Lifespan varies from a few days to many years
- Monocytes
- Mature into macrophages, which are antigen-presenting cells
Thrombocytes (Platelets)
- Small, anucleate cells, 2 to 4 μm in size
- 150,000 to 400,000/μL
- Lifespan of approximately 10 days
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Description
This quiz covers the composition of whole blood, including the different types of blood cells, their functions, and characteristics.
