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Questions and Answers
What is the main function of mitosis?
What is the stage of mitosis during which chromosomes become visible?
What is the term for the division of the cytoplasm?
What is the term for cell division that results in haploid daughter cells?
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What is the stage of mitosis during which chromosomes are firmly attached to the mitotic spindle at its equator?
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What is the stage of mitosis during which the two sets of chromosomes separate and move away from each other?
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What is the stage of mitosis during which two daughter nuclei are formed?
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What type of cells undergoes mitosis?
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What type of epithelium lines the interlobular ducts?
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What is an example of a simple coiled tubular gland?
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What type of gland has a single duct and multiple sac-like secretory portions?
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What is the term for glands that have a single duct that does not branch?
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What is an example of a gland that is classified as a simple branched tubular gland?
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What is the term for glands that release their products through a mechanism involving the rupture of gland cells?
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What is an example of a simple acinar/alveolar gland?
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What is the term for glands that release their products through a mechanism involving the secretion of products from the apical region of gland cells?
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What is the characteristic of Compound Tubular glands?
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Which type of gland is the most common based on gland-cell participation?
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What is the process by which secretions are released in Merocrine glands?
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What is characteristic of Holocrine glands?
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What is an example of a Compound Acinar/Alveolar gland?
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What is characteristic of Apocrine glands?
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What is an example of a Compound Tubuloacinar gland?
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What is an example of a Holocrine gland?
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What lines the ducts of glands or organs?
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What characteristic is not typical of epithelial tissue?
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Which type of epithelium lines the interior of blood vessels?
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Where are microvilli typically found in an epithelial cell?
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What is the characteristic shape of columnar epithelial cells?
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What is the function of simple squamous epithelium in blood vessels?
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Why are epithelial tissues avascular?
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What is the function of desmosomes in epithelial cells?
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Where are desmosomes typically found in an epithelial cell?
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Study Notes
Structural Classes of Compound Glands
- Compound Tubular: several ducts and several elongated tube-like secretory portions, example: Submucosal glands (of Brunner) in the duodenum
- Compound Acinar/Alveolar: several rounded, sac-like secretory portions converge into a smaller duct and drain into a large duct, example: Exocrine pancreas, mammary gland
Types of Glands
- Merocrine (Eccrine) gland: most common type, secretions are released or brought to the duct via exocytosis, example: Salivary gland
- Holocrine Gland: secretory portions become part of the secretion, undergoes apoptosis (cell death), example: Sebaceous glands
- Apocrine Gland: part of the apical surface of the cell is pinched or released with the secretion, example: Mammary gland
- Compound Tubuloacinar: secretory portions have both acinar and tubular units, several ducts, example: Salivary glands
Simple Glands
- Simple Coiled Tubular: 1 duct and very long and coiled secretory portion, example: Sweat glands
- Simple Acinar/Alveolar: 1 duct and rounded, sac-like secretory portion, example: Small mucous glands along the urethra
- Simple Branched Acinar: 1 duct and multiple sac-like secretory portions, example: Sebaceous gland
Epithelial Tissue
- Overview: avascular, polar, and non-excitable
- Functions: forms boundaries, regulates exchange, and provides sensation
Mitosis
- Phases: prophase, metaphase, anaphase, and telophase
- Meiosis: type of cell division that results in haploid daughter cells, occurs mainly in germ cells
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