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56 Cards in this Set
- Front
- Back
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the oral mucosa is composed of…
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stratified squamous epithelium (nonkeratinized, parakeratinized, ot orthokeratinized) and an underlying ct
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the underlying ct (lamina propria) may be divided into which 3 classifications?
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lining mucosa, masticatory mucosa, and specialized mucosa
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the oral cavity is composed of…
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the lips, teeth, gingiva, palate, and tongue
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the lip has what 3 regions?
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the skin aspect, the vermilion zone, and the mucous (internal) aspect
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how is the gingiva (gums) attached to the enamel?
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by a thin, wedge-shaped, stratified squamous nonkeratinized epithelium - aka junctional epithelium
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the palate is composed of…
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the hard palate, the soft palate, and the uvula
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what separates the oral and nasal cavities from each other?
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the uvula
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what are the 3 regions of the tongue?
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the anterior 2/3, the posterior 1/3, and a root
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what are the 4 types of lingual papillae of the tongue?
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filiform, fungiform, foliate, and circumvallate
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taste buds are…
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intraepithelial sensory organs that function in the perception of taste
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what are the 4 types of cells that consitute the taste bud?
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basal cells, dark cells, light cells, and intermediate cells
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basal cells are…
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type IV cells
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dark cells are…
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type I cells
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light cells are…
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type II cells
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intermediate cells are…
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type III cells
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nerve fibers enter the taste bud and form…
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synaptic junctions with type I, type II, and type III cells
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which cell types are involved in the discernment of taste?
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type I, type II, and type III
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each of these cell types have…
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long, slender microvilli that protrude from the microvilli
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what are the 4 primary taste sensations?
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salty, sweet, sour, and bitter
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even though every taste bud can discern each of the 4 sensations, each taste bud specializes in…
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2 of the 4 tastes
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the taste modalities of salty and sour are due to the presence of
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specific ion channels in the plasmalemma of the cells of the taste bud
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the taste modalities of bitter and sweet are due to the presence of
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g-protein coupled membrane receptors in the plasmalemma of the cells of the taste bud
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extramural glands of the digestive system include…
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the major salivary glands associated with the oral cavity, the pancreas, and the liver and gall bladder
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the secretory products of the above glands are delivered to…
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the lumen of the alimentary tract by a system of ducts
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by producing saliva, the salviary glands facilitate the process of…
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tasting food, intiate its digestion, and permits it deglutition (swallowing)
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what else do the salivary glands secrete that protect the body?
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lysozyme, lactoferrin, and secretory IgA
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20-30% of the total resting salivary volume is produced by…
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parotid
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60-65% of the total resting salivary volume is produced by…
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submandibular
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2-5% of the total resting salivary volume is produced by…
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sublingual
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minor salivary glands include…
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glands of von ebner, anterior lingual glands, lingual, buccal, labial, and palatal
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major glands are,…
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compound tubulo-alveolar
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minor glands…
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vary depending on size and duct complexity
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serous salivary glands include…
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parotid and von-ebner
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mixed salivary glands include…
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submandibular ; sublinugal + minors
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even though it is mixed, submandibular glands are predominantly…
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serous
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even though they are mixed, sublingual + minors are predominantly…
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mucous
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each of the major salivary glands has what 2 portions?
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a secretory and a duct portion
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the secretory portions of the salivary glands are composed of…
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serous and/or mucous secretory cells arranged in acini (alveoli) or tubules that are couched by myoepithelial cells
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the secretory portions, arranged in tubules and acini, are composed of what 3 types of cells?
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serous, mucous, and myoepithelial
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serous cells are seromucous cells because
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they secrete both proteins and polysaccharides
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which cells resemble truncated pyramids and have single, round, basally located nuclei, a well-developedRER and golgi complex, numerous basal mitochondria, and abundant apically rich in ptyalin (salivary amylase)?situated secretory granules
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serous cells
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apical to the tight junctions, what communicates with the lumen?
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intercellular canaliculi
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mucous cells are similar in shape to the serous cells except…
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their nuclei are basally located BUT are flattened instead of being round
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how does the organelle population of the mucous cells differ from that of serous cells?
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mucous cells have fewer mitochondria, less extensive RER, greater golgi apparatus; however, the apical region of the cytoplasm is occupied by abundant secretory granules; the intercellular canaliculi and processes of the basal cell membranes are much less extensive than those of serous cells
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acinus…
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are pyramidal shaped cells
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acinus can be either…
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mucous or serous
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demilunes may be present in…
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mixed glands
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zymogen granules contain…
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a host of protein products
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what are the 3 kinds of ducts?
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intercalated ducts, striated ducts, and excretory ducts
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which ducts connect acinar lumen with striated ducts?
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intercalated ducts
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which ducts are composed of simple cuboidal cells resembling secretory cells?
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intercalated ducts
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which ducts may contain secretory granules, but which are not released?
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intercalated ducts
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which ducts are important in salivary volume regulation?
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striated ducts
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which ducts are tall, columnar cells with microvilli and basal infoldings filled with mitochondria?
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striated ducts
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which ducts vary in histology depending on size?
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excretory ducts
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which ducts are primarily only a conduit?
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excretory ducts
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