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Questions and Answers
What percentage of blood is constituted by its cellular component?
What is the primary function of hemoglobin in RBCs?
Transport oxygen
Red blood cells (RBCs) contain a nucleus.
False
The fluid component of blood is called ______ and constitutes ______% of the blood.
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Which of the following leukocytes are categorized as granulocytes?
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What is the primary function of hemoglobin in red blood cells?
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Red blood cells (RBCs) are _______ in shape and lack a nucleus.
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T cells and B cells are types of granular leukocytes.
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The fluid component of blood, which constitutes 55% of blood, is called:
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Hemoglobin is composed of a protein called globin and non-protein pigments called heme.
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Match the following components with their respective description:
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Which ions are considered inorganic substances found in blood plasma?
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Which of the following is a component of the fluid part of blood?
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RBCs contain a nucleus and other organelles.
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What is the significance of the biconcave shape of RBCs?
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Each heme in a hemoglobin molecule contains an ion of ______ that can combine with one oxygen molecule.
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Match the following blood cells with their characteristics:
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Which of the following blood cells are classified as agranular leukocytes?
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More than 45% of blood is composed of its fluid component.
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Name the protein that is responsible for the red color of blood.
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Study Notes
Blood Composition
- Blood is a modified connective tissue consisting of 45% cellular components and 55% fluid component (plasma).
Cellular Components
- Red blood cells (RBCs) or erythrocytes
- White blood cells (WBCs) or leukocytes, divided into:
- Granular leukocytes (granulocytes: Neutrophils, Basophils, and Eosinophils)
- Agranular leukocytes (Lymphocytes, T cells, B cells, and Monocytes)
- Platelets or thrombocytes
Fluid Component (Plasma)
- Composed of 90% water and 10% dissolved substances (solutes)
- Dissolved substances include:
- Plasma proteins (7%): Albumins, globulins, and fibrinogen (synthesized by the liver)
- Other organic substances (nutrients and waste products): urea, uric acid, ammonia, etc.
- Inorganic substances: Na, K, Ca, Cl ions, etc.
Red Blood Cells (RBCs) / Erythrocytes
- RBCs make up more than 99% of formed elements in blood
- Characteristics:
- Biconcave shape
- Contain oxygen-carrying pigment hemoglobin
- Responsible for red color of whole blood
- Flexible, biconcave shape allows RBCs to squeeze through narrow capillaries
- Lack a nucleus and other organelles
RBC Physiology
- Hemoglobin inside RBCs combines with oxygen to form oxyhemoglobin in the lungs
- Hemoglobin (Hb) molecule consists of:
- Protein called globin (composed of 4 polypeptide chains: 2 alpha and 2 beta)
- 4 non-protein pigments called heme
- Each heme contains an Fe2+ ion that can combine reversibly with one oxygen molecule
- Oxygen is transported to tissues in the form of oxyhemoglobin
- In tissues, the iron-oxygen reaction reverses, and Hb releases O2, which diffuses into cells
Blood Composition
- Blood is a modified connective tissue consisting of 45% cellular components and 55% fluid component (plasma).
Cellular Components
- Red blood cells (RBCs) or erythrocytes
- White blood cells (WBCs) or leukocytes, divided into:
- Granular leukocytes (granulocytes: Neutrophils, Basophils, and Eosinophils)
- Agranular leukocytes (Lymphocytes, T cells, B cells, and Monocytes)
- Platelets or thrombocytes
Fluid Component (Plasma)
- Composed of 90% water and 10% dissolved substances (solutes)
- Dissolved substances include:
- Plasma proteins (7%): Albumins, globulins, and fibrinogen (synthesized by the liver)
- Other organic substances (nutrients and waste products): urea, uric acid, ammonia, etc.
- Inorganic substances: Na, K, Ca, Cl ions, etc.
Red Blood Cells (RBCs) / Erythrocytes
- RBCs make up more than 99% of formed elements in blood
- Characteristics:
- Biconcave shape
- Contain oxygen-carrying pigment hemoglobin
- Responsible for red color of whole blood
- Flexible, biconcave shape allows RBCs to squeeze through narrow capillaries
- Lack a nucleus and other organelles
RBC Physiology
- Hemoglobin inside RBCs combines with oxygen to form oxyhemoglobin in the lungs
- Hemoglobin (Hb) molecule consists of:
- Protein called globin (composed of 4 polypeptide chains: 2 alpha and 2 beta)
- 4 non-protein pigments called heme
- Each heme contains an Fe2+ ion that can combine reversibly with one oxygen molecule
- Oxygen is transported to tissues in the form of oxyhemoglobin
- In tissues, the iron-oxygen reaction reverses, and Hb releases O2, which diffuses into cells
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Description
Identify and learn about the different components of blood, including red and white blood cells, platelets, and plasma. This quiz is ideal for students studying physiology or biology.
