chapter 1: epithelial glands Flashcards
method of secretion by which the product is released into a duct or directly onto an epithelial surface
exocrine secretion
- components directly involved with the primary function
- muscle cells
parenchyma
- components providing mechanical/metabolic support
- blood vessels, nerves, lymphatics, CT
stroma
3 methods of sub classifying exocrine secretion
morphology
method of secretion
product secreted
method classifies gland according to shape of secretory units and duct arrangement
morphology
-tubular vs. acinar (alveolar)
-unbranched vs. branched
examples of which classification:
morphology
- MC method of secretion
- secretion by exocytosis
merocrine
goblet cells, salivary glands, pancreas, all sweat glands in kids, many adult sweat glands secreted through
merocrine
- secretion in which:cell matures and DIES
- product= entire cell with intact vacuoles
- associated with odor
holocrine
-sebaceous glands
-tarsal glands of eyelids
secreted by:
holocrine
- cell damage is minimal
- secretory product= some cytoplasm, membranes and intact vacuoles
- associated with ODOR
aporcrine
lactating mammary glands, some adult sweat glands, ceruminous glands in external auditory canal, ciliary glands in eyelid
apocrine
smallest division of a gland
acinus
small group of serous cells attached to mucus acinus
serous demilune
contractile cells with epithelial origin; cells wrap around the acini and sometimes the ducts in some exocrine glands
myoepithelial cells
cells that function to assist secretion by pushing out product
myoepithelial cells
glands that produce proteins
serous glands
characteristics of serous glands
trapezoid shaped
nucleus is round and noticeable
cells pick up stains
glands that produce mucus
mucus glands
characteristics of mucus glands
cells typically stain light
nucleus is flat and peripheral
glands that produce serous and mucus
mixed glands
examples of mixed glands
sublingual glands
submandibular glands
examples of serous glands
pancreas
parotid gland
chief cells in stomach
examples of mucus glands
goblet cells
mucus cells in stomach
minor salivary glands in tongue and palate
___ blood will _____ oxygen which will ____ secretion
increase
increase
increase
exocrine regulation
myoepithelial cells
hormonal
secretory product released into nearby CT for vascular dispersal to target cells/organs
endocrine secretion
signaling cell is close to target cell so the hormone does not enter blood
paracrine secretion
signaling cell is its own target
autocrine secretion
regulation of endocrine secretion
hormonal (+/- feedback loops)
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