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Define histology
The study of tissues
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Iddentify the four major types of tissues in the body
- Epithelial
- Connective
- Muscle
- Neural
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List 5 important charactheristics of epithelial tissue
- Cellularity
- Polarity
- Attachment
- Avascularity
- Regeneration
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4 essential functions of Epithelial tissue
- Provide Physical Protection
- Control Permeability
- Provide Sensation
- Produce Specialized Secretions
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What is the probable function of an epithelial surface whose cells bear many microvilli?
Absorption or secretion
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Identify the various types of epithelial cell junctions?
- tight junction
- cap junction
- desmosomes
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What is the functional significance of gap junctions?
They form a narrow passageway that lets small molecules and ions pass from cell to cell
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Identify the three cell shapes of characteristic of epithelial cells.
- squamous
- stratified
- cuboidal
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When classifying epithelial tissue, the number of layers of cells determins whether it is simple or stratified. A single layer of cells is termed ______, whereas multiple layers of cells are known as _________.
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Using a light microscope, a tissue appears as a simple squamous epithelium. Can this be a sample of the skin surface? Why or why not?
Yes, it is the first layer of skin
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Why do the pharynx, esphagus, anus, and vagina have a similar epithelial organization?
so they can shed rapidly
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Name the two primary types of glandular epithelia
- Endocrine glands
- Exocrine glands
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The secretory cells of sebaceous glands fill with secretions and then rupture, releasing their contents. Which mode of secretion is this?
holocrine secretion
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Which type of gland releases its secretions directy into the extracellular fluid?
endocrine
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Identify several functions of connective tissues
- Establishing a structural framework for the body
- Transporting fluids and dissolved materials
- Protecting delicate organs
- Supporting, surrounding, and interconnecting other types of tissue
- Storing energy reserves, especially in the form of triglycerides
- Defending the body from invading microorganisms
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LIst the three categories of connective tissues
- Connective tissue proper
- Fluid connective tissues
- Supporting connective tissues
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Identify the populations of cells found in connective tissue proper
- Loose connective tissues (adipose tissue)
- Dense connective tissues ( tendons)
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