Questions and Answers
In terms of its tissue classification, blood is classified as a _________________________
connective tissue
Blood has living blood cells called ______________
formed elements
These blood cells are suspended in a nonliving fluid matrix called
plasma
The fibers of blood only become visible during
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Most of the compacted cell mass is composed of
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The volume of the blood accounted for by these cells is referred to as the
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The less dense ______ rises to the top and constitutes about 45% of the blood volume
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The so-called 'buffy coat', composed of ___________ and __________, is found at the junction between the other two blood elements
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The buffy coat accounts for less than ______ of blood volume
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Blood is scarlet red in color when it is loaded with __________, otherwise it tends to be dark red
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Most numerous leukocyte
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Granular leukocytes
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Also called an erythrocyte, anucleate
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Actively phagocytic leukocytes
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Agranular leukocytes
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Fragments to form platelets
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Examples of formed elements
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Increases during allergy attacks
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Releases histamine during inflammatory reactions
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After originating in bone marrow, may be formed in lymphoid tissue
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Contains hemoglobin
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Primarily water, noncellular; the fluid matrix of blood
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Increases in number during prolonged infections
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Least numerous leukocyte
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Also called white blood cells
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What is the stimulus for making more RBC?
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White blood cells move into and out of blood vessels by the process of...
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An abnormal decrease in the number of WBCs is...
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A normal pH range of blood is _____
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The cardiovascular system in an average adult contains approximately _______ liters of blood
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Anemia resulting from a decreased RBC number causes the blood to become _______ viscous
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Rank the following lymphocytes from most abundant to least abundant
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Study Notes
Blood Classification and Composition
- Blood is classified as connective tissue, consisting of living cells and a nonliving matrix.
- Living blood cells are known as formed elements, suspended within a fluid matrix called plasma.
- The solid components of blood primarily contain erythrocytes, which make up the majority of the cell mass.
- Plasma constitutes about 55% of blood volume and is the less dense component that rises to the top.
Blood Components
- The hematocrit is the term for the volume percentage of red blood cells in blood.
- The "buffy coat" is a thin layer between erythrocytes and plasma, consisting of leukocytes and platelets, accounting for less than 1% of total blood volume.
- Blood is bright scarlet red when oxygenated and dark red when deoxygenated.
White Blood Cells
- Neutrophils are the most numerous type of leukocyte and are actively phagocytic.
- Granular leukocytes include neutrophils, eosinophils, and basophils, while agranular leukocytes consist of monocytes and lymphocytes.
- Eosinophils increase during allergy attacks, whereas basophils release histamine during inflammatory responses.
- Monocytes are elevated during prolonged infections.
Red Blood Cells
- Red blood cells (RBCs), or erythrocytes, lack nuclei and are crucial for transporting oxygen due to their hemoglobin content.
- The stimulus for increased red blood cell production is low oxygen levels in the blood.
- Blood viscosity decreases when there is a reduction in red blood cell count.
Blood Cell Regulation and pH
- Diapedesis is the process by which white blood cells exit blood vessels to perform immune functions.
- Leukopenia refers to an abnormal decrease in the number of white blood cells.
- Normal blood pH ranges from 7.35 to 7.45, maintaining acid-base homeostasis.
Blood Volume
- The average adult cardiovascular system contains approximately 5.5 liters of blood, vital for bodily functions.
Lymphocyte Abundance
- The order of abundance for lymphocyte types is: Neutrophil, Lymphocyte, Monocyte, Eosinophil, Basophil.
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Description
This quiz covers the classification and composition of blood as a connective tissue, its cellular components, and the role of different types of blood cells. You will explore topics such as erythrocytes, plasma, and the functions of leukocytes. Test your knowledge on how blood is structured and its various functions in the body.
