Salivary Gland Lecture Flashcards
(24 cards)
T/F Merocrine glands lose cytoplasm when release secretory product
F
Don’t lose cytoplasm
Salivary glands away from oral cavity
Parotid Mandibular Sublingual Zygomatic Molar
Salviary glands within oral cavity
Labial Lingual von Ebner's Buccal Palatine
Example of serous gland (high protein)
Parotid
Example of mucous gland (sugar)
Palatine
Example of mixed gland (protein + sugar)
Sublingual
which gland is most consitant in secreting their product across species
Serous=protein
Serous salivary gland secretions include
Salivary amylase
kallikrein
lactoferrin
lysozyme
Describe serous salivary glands
- nucleus
- granules
- cell arrangement
Round nucleus at base
Acidophilic granules at apex
Secretory cells arranged in acinus
Mucuous salivary gland product
Mucinogen
Describe mucous salivary gland
- Nucleus
- Granules
- arrangment of cells
Flat nucleus in base of cell
Frothy cytoplasm due to lightly stained secretory granules
Acinus or “tube-like”
Mixed salivary gland
-arrangements
1-individual secretory end pieces of serous and mucous cells secrete into common duct
2-Integrated secretory end pieces of mucous cells covered by cao of serous cells (serous demilune)
How do serous cells of mixed gland secrete into lumen
Via intercellular canaliculi running btw mucous cells
What surrounds base of secretory sells in salivary glands
Myoepithelial cell (basket cell)
Purpose of myoepithelial cell
Prevents increased intraluminal pressure from distending secretory end pieces
Hierarchy of salivary duct (from small to large)
Intercalated duct (w/n lobule) Intralobular duct (w/n lobule) Interlobular duct (btw lobule) Lobar duct (btw lobules) Main duct (opens into body cavity)
Intercalated duct
- where
- classify
Directly connected to secretory acinii or tubules
Small simple cuboidal (4-8 cells in cross-section)
Surrounded by myoepithelial
Intralobular duct
- describe
- classify
Numerous infoldings of basal cell membrane, looks STRIATED.
- Striations contain mito
- Mito gives E to secrete HCO2, K+ in saliva and extrct Na+, Ca2_ from saliva
Simple columnar
Interlobular duct
- classify
- surrounded by
Simple columnar or str cuboidal
Surrounded by CT
Lobar duct
-Classify
Str columnar
Surrounded by CT
Main duct
-classify
Str epithelium
Surrounded by CT
Components in saliva
Digestive enzymes Antimicrobial agents Ions Growth factors Clotting factors
Antimicrobial agents in saliva
Lactoperoxidase and lactoferrin
(made by serous and inercalated duct cells and binds to Fe to stop bacterial metabolism)
Lysozyme
(serous and intercalated duct cells destroy bacterial capsule)
IgA Ab
(Produced by plasma cells then transferred to saliva by secretory cells
Thiocyanate
Digestive enzymes in saliva
Amylase
Maltase
Kallikrein
Lipase
