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22 Cards in this Set
- Front
- Back
What are glycoproteins involved with in protections?
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1. lubrication of food, mucosa, teeth
2. waterproofing of mucosa: mucin (a glycoprotein) 3. barrier against irritants and toxins in food and microorganisms: mucin 4. lavage/washing action removed bacteria from teeth |
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What purpose does phosphate and bicarbonate serve in saliva?
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1. Maintain pH unsuitable for bacterial colonization.
2. Neutralize acid produced by bacteria. This also helps in neutralizing esophageal contents. |
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What functions does salive have in digestion?
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1. Formation of food bolus: water
2. Neutralization of esophageal contents: phosphate and bicarbonate 3. Digestion of carbohydrates: amylase 4. Digestion sof fats: lipase made by serous glands of Von Ebner |
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What functions does saliva have in taste?
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1. solution of molecules: water
2. taste bud growth and maturation: gusten |
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What functions does saliva have in antimicrobial activity?
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1. lysozyme: hydrolyzes bacterial cell walls
2. Lactoferring: binds iron and withholds it from bacteria 3. salivary peroxidase: inhibits growth of bacteria by generating oxidizing agents 4. IgA antibody: agglutinates bacteria and inhibits human immunodeficiency virus |
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What purpose does saliva have in maintaining tooth integrity?
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Calcium and phosphate promote maturatin and remineralization.
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Saliva plays what type of role in regulatory proteins?
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Production of growth factors and other regulatory proteins such as nerve growth factor and vasoactive peptides.
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What can xerostomia cause and causes of it(dry mouth, insufficient saliva)?
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1. Causes of serostomia: aging, medications, radiation therapy, systemic diseases
2. Effects of serostomia: difficulty eating, speaking, wearing dentures, oral mucosal ulcers (sores); increased caries, candidosis |
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What is required for the development of salivary glands?
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1. A downgrowth of oral surface epithelium
2. Ectomesenchyme |
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What is stroma?
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Connective tissue framework of salivary glands
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What is significance of stroma?
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1. Capsule of dense irregular connective tissue
2. Septa of fibrous connective tissue divide gland into lobes and lobules 3. connective tissue carries blood vessels, nerves and ducts |
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What is parenchyma?
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Functional part of salivary glands.
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What is significant of parenchyma?
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1. Secretory units (alveoli)
a. spherical unit (acinus) b. tubule- composed of mucous cells. Larger than central lumen c. tubule of mucous cells capped by a serous demilune. Secretion of serous cells reaches the central lumen via intercellular canaliculi |
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What are myoepithelial cells?
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secretory system, (gleeking- shooting of saliva); somewhat involved in tumors
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Serous cells secrete by?
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Exocytosis (merocrine mode) into the central lumen.
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Parotid gland summary
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ducts within lobules are intercalated and striated; ducts between are interlobular; secretory units are all serous
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submandibular glands summary
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ducts within lobules intercalated and striated; ducts between interlobular (all are); more serous than mucous
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sublingual glands summary
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ducts within lobules are intralobular; ducts between interlobular; more mucous than serous
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minor glands
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ducts within intralobular, ducts between interlobular; secretes mucous excepts serous glands of Von Ebner
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Intercalated ductos of the parotid and submandibular glands produce what?
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lysozyme and lactoferrin
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Striated ducts of the parotid and submandibular glands do what?
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reasorb sodium and excrete potassium
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Mucous secretions secretions are?
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thick and sticky, consisting of glycoproteins and incrased carbohydrates and decreased enzyme content compared to serous secretion
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