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Questions and Answers
What is the primary function of blood in the body?
What percentage of total body weight does blood typically represent?
Where are blood cells primarily formed?
In a centrifuged blood sample, what is the component that occupies the top layer?
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What is the percentage range of red blood cells in females?
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Which of the following is the condition characterized by a high white blood cell count?
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What is the main role of platelets in the blood?
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What is the measure of the percentage of red blood cells in a blood sample called?
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Study Notes
Blood Characteristics
- Blood is connective tissue with a liquid matrix called plasma
- Blood transports essential substances and regulates homeostasis
- Blood maintains interstitial fluid stability, distributes heat, and varies in volume based on body size, fluid concentration, electrolyte concentration, and adipose tissue
- Approximately 8% of body weight is blood; adults have about 4 to 5 liters of blood (female) and 5 to 6 liters (male)
- Blood Cells are called “formed elements” and are generated in red bone marrow:
- Red blood cells (RBCs)
- White blood cells (WBCs)
- Platelets (cell fragments)
Centrifuged Blood Samples
- Centrifuged blood samples are used to detect blood abnormalities
- Plasma is the clear, straw-colored liquid matrix of blood, comprising about 55% of the blood volume and found at the top of a centrifuge tube
- Red blood cells (RBCs) represent 35 to 46% in females and 40 to 54% in males, located at the bottom of the centrifuge tube
- Hematocrit (HCT) is the percentage of red blood cells
- White blood cells (WBCs) and platelets generally equal about 10,500
- High WBC counts indicate acute infections, strenuous exercise, and significant fluid loss
- Leukopenia is a low WBC count.
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Description
Explore the fascinating characteristics of blood, including its role as a connective tissue and its components. This quiz covers the significance of blood volume, the formation of blood cells, and the analysis of centrifuged blood samples to detect abnormalities. Test your knowledge on these vital topics!
