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Questions and Answers
Which type of tissue is characterized by tightly packed cells with very narrow intercellular spaces?
Which type of tissue is characterized by tightly packed cells with very narrow intercellular spaces?
What is the function of the Ectoblast germ layer?
What is the function of the Ectoblast germ layer?
What type of tissue is composed of adipose tissue, cartilage tissue, and bone tissue?
What type of tissue is composed of adipose tissue, cartilage tissue, and bone tissue?
What is the origin of the covering epithelium lining the intestine?
What is the origin of the covering epithelium lining the intestine?
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Which of the following tissues is NOT derived from the Mesoblast germ layer?
Which of the following tissues is NOT derived from the Mesoblast germ layer?
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What is the term for the process by which tissues differentiate during embryonic development?
What is the term for the process by which tissues differentiate during embryonic development?
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Which type of epithelial tissue is also known as glandular epithelium?
Which type of epithelial tissue is also known as glandular epithelium?
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What is the characteristic feature of the cells in epithelial tissues under a light microscope?
What is the characteristic feature of the cells in epithelial tissues under a light microscope?
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What is the main characteristic of connective tissues?
What is the main characteristic of connective tissues?
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What is the origin of connective tissues?
What is the origin of connective tissues?
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What is the main function of connective tissues?
What is the main function of connective tissues?
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Which of the following is NOT a type of specialized connective tissue?
Which of the following is NOT a type of specialized connective tissue?
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What is the characteristic of fixed cells in non-specialized connective tissue?
What is the characteristic of fixed cells in non-specialized connective tissue?
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What is the type of cell that is the principal and the least specialized cell of the connective tissue?
What is the type of cell that is the principal and the least specialized cell of the connective tissue?
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What is the main component of the extracellular matrix in connective tissues?
What is the main component of the extracellular matrix in connective tissues?
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Which of the following is NOT a function of connective tissues?
Which of the following is NOT a function of connective tissues?
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What type of collagen is predominantly found in reticular connective tissues?
What type of collagen is predominantly found in reticular connective tissues?
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What is the function of the basal lamina in epithelial tissue?
What is the function of the basal lamina in epithelial tissue?
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Which of the following organs' stroma is formed by reticular connective tissues?
Which of the following organs' stroma is formed by reticular connective tissues?
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What distinguishes glandular cells from other types of cells?
What distinguishes glandular cells from other types of cells?
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What is the primary function of adipocytes?
What is the primary function of adipocytes?
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Which type of adipocyte is characterized by a large lipid droplet and a peripheral nucleus?
Which type of adipocyte is characterized by a large lipid droplet and a peripheral nucleus?
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How do exocrine glands differ from endocrine glands?
How do exocrine glands differ from endocrine glands?
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What useful function do mitochondria serve within white adipocytes?
What useful function do mitochondria serve within white adipocytes?
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What is the term for glands that have both exocrine and endocrine functions?
What is the term for glands that have both exocrine and endocrine functions?
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How are glandular epithelia formed?
How are glandular epithelia formed?
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What process describes the breakdown of triglycerides in adipocytes?
What process describes the breakdown of triglycerides in adipocytes?
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What is the relationship between the covering epithelium and the lumen of an organ in an exocrine gland?
What is the relationship between the covering epithelium and the lumen of an organ in an exocrine gland?
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Which structure primarily surrounds white adipocytes?
Which structure primarily surrounds white adipocytes?
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What is the typical diameter range of white adipocytes?
What is the typical diameter range of white adipocytes?
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What is the function of secretory vesicles in glandular cells?
What is the function of secretory vesicles in glandular cells?
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Which of these is NOT a characteristic of covering epithelia?
Which of these is NOT a characteristic of covering epithelia?
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What is the primary function of blood tissue?
What is the primary function of blood tissue?
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Which of the following is NOT a component of plasma?
Which of the following is NOT a component of plasma?
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What is the approximate percentage of plasma in the total blood volume?
What is the approximate percentage of plasma in the total blood volume?
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Which type of plasma protein is most abundant?
Which type of plasma protein is most abundant?
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What is the main function of fibrinogen?
What is the main function of fibrinogen?
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What is the approximate percentage of formed elements in the total blood volume?
What is the approximate percentage of formed elements in the total blood volume?
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What is the role of bone remodeling in the skeletal system?
What is the role of bone remodeling in the skeletal system?
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What is the difference between woven bone and lamellar bone?
What is the difference between woven bone and lamellar bone?
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Study Notes
Tissue Classification
- Epithelial tissues consist of tightly packed cells with minimal intercellular spaces, acting as barriers and filters.
- Connective tissues have cells that are widely spaced, embedded in a substantial extracellular matrix (ECM).
- Muscle tissues include striated (skeletal and cardiac) and smooth muscles, essential for movement and circulation.
- Nervous tissues function in signal transmission, comprising central and peripheral nervous system components.
Histogenesis
- Tissue development begins from three embryonic germ layers:
- Ectoblast: Forms epithelial tissues (epidermis) and nervous tissue.
- Mesoblast: Origin of connective tissues (including cartilage and bone), as well as muscle tissues.
- Endoblast: Gives rise to epithelial linings of the intestine, respiratory system, and urogenital tract.
- Organs can contain multiple tissue types with diverse embryological origins.
Epithelial Tissues
- Covering epithelia provide protection and permeability, differentiating depending on their location and function.
- Glandular epithelia specialize in secretion, arising from embryonic covering epithelia.
- Exocrine glands maintain contact with covering epithelium, while endocrine glands are detached and form in vascularized mesenchyme.
Connective Tissues
- Non-specialized connective tissues originate from embryonic mesenchyme, characterized by a rich extracellular matrix.
- Fixed cells (e.g., fibroblasts) are non-motile and maintain the structural framework.
- Connective tissues serve diverse functions like protection, support, transport, and energy storage.
Adipose Tissue
- Adipose tissue is a loose connective tissue primarily responsible for lipid storage, comprising adipocytes.
- Two types of adipocytes are recognized:
- White adipocytes store energy and have a single large lipid droplet.
- Brown adipocytes generate heat and contain numerous small lipid droplets.
- Adipocytes are unable to divide; new adipocytes arise from the differentiation of adipoblasts.
Blood Tissue
- Blood is a specialized connective tissue containing formed elements (cells) suspended in plasma.
- Plasma, the liquid component, constitutes 55% of blood volume, containing:
- Water (91.5%)
- Plasma proteins (7%) such as albumins, globulins, and fibrinogen
- Other solutes (1.5%) including organic materials and electrolytes.
- Formed elements (45% of blood volume) include diverse blood cells essential for immune response and oxygen transport.
Functions of Blood
- Blood maintains homeostasis, regulating body temperature, pH, and waste removal.
- It transports oxygen, nutrients, hormones, and defense mechanisms to tissues while facilitating clotting during injury.
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Description
Test your knowledge of different types of epithelial and connective tissues, including covering epithelium, glandular epithelium, loose connective tissue, and more.
