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35 Cards in this Set
- Front
- Back
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What is the study of tissue
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histology
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What are the 4 tissues
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epithelial
connective muscle nervous |
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Epithelial tissue contains no ____ which means it is ____.
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blood vessels
avascular |
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Explain the characteristic of cellularity
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composed almost entirely of cells with little extracellular matrix
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Explain the characteristic of polarity
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have an apical surface (top) and basal surface (bottom)
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Explain the characteristic of attachment
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basal surface attached to basement membrane which is acellular
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Explain the characteristic of avascularity
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no blood vessels
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Explain the characteristic of innervation
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nerve rich
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Explain the characteristic of regeneration
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apical surface cells die quickly, but are replaced quickly as well
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4 major functions of epithelial tissue
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physical protection
selective permeability secretion sensation |
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Where is the basement membrane
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between epithelium and underlying connective tissue
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How are epithelial cells bound to each other? What are the 4?
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intercellular junctions
tight junction adhering junction desmosome gap junction |
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What junction is located at the apical surface, and prevents molecules from traveling between epithelial cells?
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tight junctions
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What junction is just deep to tight junctions?
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adhering junction
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What junction is lacated at the apical surface, and stabalizes the apical surface?
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adhering junction
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What junctions are deep to the adhering junction.
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desmosomes
gap junction |
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What juncion appears at locations of mechanical stress?
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desmosome
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What is the major identifiable feature of desmosomes
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filaments on the cytoplasmic side
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What junction has fluid filled channels
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gap junctions
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What do gap junctions do
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allow adjacent cells to communicate
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What are the three classifications of epithelia
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simple
stratified psuedostratified |
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Epithelia are named according to what?
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the shape of the cells at the apical layer
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Number of cell layers of a simple epithelium
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1
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Number of cell layers of a stratified epithelium
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2 or more
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Number of cell layers of a psuedostratified epithelium
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1
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Which epithelium only has a single layer of cells?
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simple
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Which epithelium only has 2 or more layers of cells?
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stratified
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Which epithelium appears to be multilayered but is only single layered
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psuedostratified
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Simple epithelium is for ____
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movement
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Stratified epithelium is for ____
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protection
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Skin is what class of stratified epithelia?
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Stratified squamos
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What are the shape classification of epithelia?
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squamous
cuboid columnar |
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What type of epithelia changes shape between squamos and cuboidal, such as in the ____?
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transitional epithelium
urinary bladder |
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4 major classes of simple epithelium?
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squamos
cuboidal columnar columar ciliated |
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4 major classes of stratified epithelium?
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squamos
cuboidal columnar psuedostratified columnar |
