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Questions and Answers
What type of tissue covers and lines the external and internal body surfaces?
What type of tissue covers and lines the external and internal body surfaces?
What is the function of Hemidesmosomes?
What is the function of Hemidesmosomes?
What is the term for the process by which epithelial cells adhere to the underlying tissue?
What is the term for the process by which epithelial cells adhere to the underlying tissue?
What are the small cavities lined by epithelial tissue?
What are the small cavities lined by epithelial tissue?
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What is the plural form of the term for epithelial tissue?
What is the plural form of the term for epithelial tissue?
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What type of cells are found in the most superficial layers of this tissue?
What type of cells are found in the most superficial layers of this tissue?
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What is the source of oxygen and metabolites for cellular nutrition?
What is the source of oxygen and metabolites for cellular nutrition?
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What is the shape of the cells found in the deeper layers of this tissue?
What is the shape of the cells found in the deeper layers of this tissue?
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What is the characteristic of the cells found in the most superficial layers of this tissue?
What is the characteristic of the cells found in the most superficial layers of this tissue?
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What is a characteristic of connective tissue that facilitates cellular nutrition?
What is a characteristic of connective tissue that facilitates cellular nutrition?
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What is the progression of cell shape from deeper to more superficial layers of this tissue?
What is the progression of cell shape from deeper to more superficial layers of this tissue?
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How do cells obtain oxygen and metabolites?
How do cells obtain oxygen and metabolites?
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What is NOT a characteristic of the cells in this tissue?
What is NOT a characteristic of the cells in this tissue?
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What is the purpose of the adjoining connective tissue in cellular nutrition?
What is the purpose of the adjoining connective tissue in cellular nutrition?
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What is shared between connective tissue and cells?
What is shared between connective tissue and cells?
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What is the smallest living unit in the body?
What is the smallest living unit in the body?
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What is the study of body tissues using microscopes called?
What is the study of body tissues using microscopes called?
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What is the process of cell division that results in the reproduction of cells?
What is the process of cell division that results in the reproduction of cells?
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What is the term for the uptake of material from outside the cell to inside?
What is the term for the uptake of material from outside the cell to inside?
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What is the term for the active transport of material from a vesicle within the cell to the outside?
What is the term for the active transport of material from a vesicle within the cell to the outside?
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What is the function of the cell membrane?
What is the function of the cell membrane?
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What is the term for a collection of similar cells?
What is the term for a collection of similar cells?
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What is the term for an independent body part formed from tissues?
What is the term for an independent body part formed from tissues?
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What is the term for a group of organs that work together to perform a specific function?
What is the term for a group of organs that work together to perform a specific function?
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What type of cells lack a nucleus or membrane-bound organelles?
What type of cells lack a nucleus or membrane-bound organelles?
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What happens to epithelial cells as they move from the deeper germinal layers to the surface of the tissue?
What happens to epithelial cells as they move from the deeper germinal layers to the surface of the tissue?
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What is the purpose of epithelial cells moving from the deeper germinal layers to the surface of the tissue?
What is the purpose of epithelial cells moving from the deeper germinal layers to the surface of the tissue?
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What is the location of the germinal layers in epithelial tissue?
What is the location of the germinal layers in epithelial tissue?
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What process do epithelial cells undergo as they move towards the surface of the tissue?
What process do epithelial cells undergo as they move towards the surface of the tissue?
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What happens to epithelial cells at the surface of the tissue?
What happens to epithelial cells at the surface of the tissue?
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Study Notes
Histology of the Cell
- Histology is the microscopic study of body tissues using light or electronic microscopes.
- The cell is the smallest living unit in the body and consists of a cell membrane, cytoplasm, and organelles.
- The cell can be compared to a small city with factories, boundaries, and industries that make it almost self-sufficient.
Body Components
- The body consists of cells, muscle fibers, nerve cells, epithelial cells, bone cells, fibroblasts, erythrocytes, macrophages, and sperm.
- Tissues are collections of similar cells, including epithelium, nervous tissue, muscle, cartilage, bone, connective tissue, and blood.
Organ and System
- An organ is an independent body part formed from tissues, such as skin, brain, heart, and liver.
- A system is a group of organs functioning together, including the central nervous system, respiratory system, immune system, and cardiovascular system.
Types of Cells
- Prokaryotes are cells that lack a nucleus or membrane-bound organelles, such as bacteria.
- Eukaryotes are cells that have a nucleus and membrane-bound organelles, like plant and animal cells.
Cell Division and Interaction
- Each cell undergoes cell division to reproduce and replace dead cells.
- Cell interaction with the extracellular environment involves active transport of material from a vesicle within the cell to the extracellular environment (exocytosis) and the uptake of material from outside the cell to inside (endocytosis).
Cell Membrane and Organelles
- The cell membrane is the cell's outer layer, involved in many functions, including intercellular junctions, and contains many organelles, including vacuoles.
- Organelles are metabolically active specialized structures, including the nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi bodies, and lysosomes.
Cell Anatomy
- Cell division, or mitosis, is a complex process involving many organelles that occurs during growth or regeneration.
- Extracellular materials, such as interstitial fluid, surround each cell in a tissue, and are important for dissolving, mixing, and transporting substances.
Epithelium Properties
- Epithelium is the tissue that covers and lines both the external and internal body surfaces, including vessels and small cavities.
- Epithelial cells undergo cellular differentiation as they move from the deeper germinal layers to the surface of the tissue to be shed or lost.
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Description
This quiz covers the basics of histology, the microscopic study of body tissues, focusing on the structure and components of cells.
