QUESTIONS AND ANSWERS 100% PASS
tissues - ✔✔2 or more cells that function together toward the same task
histology - ✔✔study of tissues
where is epithelial tissue located? - ✔✔-any surface covering or lining in the body
-glands
functions of epithelial tissue - ✔✔-creates boundaries
-protection
-absorption
-filtration
-excretion
-secretion
-sensory reception
apical surface - ✔✔exposed surface
basal surface - ✔✔interior
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,away from external
-attatched to something underneath
basement membrane - ✔✔2 parts
basal lamina
reticular membrane
reticular lamina - ✔✔collagen fiber layer to add strength
is epithelium avascular - ✔✔yup
basal lamina - ✔✔attached to basal layer of epi
-adhesive sheet of protein
-selective filter
how do we classify epithelia? - ✔✔-# of cell
-shape
simple - ✔✔-absorbtion and filtration
-not a lot of friction
-easily damaged
-1 layer of cells
stratified - ✔✔-many cell layers
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,-protection
-lots of wear and tear
pseudo stratified - ✔✔one layer but looks like multiple
-lots of movement
-stretches
-not much change in shape or size
squamous - ✔✔flat
-on apical surface
cuboidal - ✔✔box like
-same width and height
columnar - ✔✔taller than they are wide
transitional - ✔✔dome shaped on apical surface
-line hollow cavities
-flatten as they stretch
-change shape
Gland - ✔✔cell or group of cels composed of eli that secretes substances into ducts, onto
surfaces, or into blood
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, -requires energy
-most secretions are water based
exocrine gland - ✔✔secrete into ducts
-sometimes secrete onto their own surface
-sweat ducts
-gallblader
endocrine gland - ✔✔do not have ducts
-secrete hormones
-travel in blood to go somewhere else
-pancrease
-thyroid
unicellular gland - ✔✔goblet cells
one cell
multi cellular gland - ✔✔many cells
merocrine gland - ✔✔cells produce glandular product, package it in golgi ap and
release it into ducts through exocytosis
-cell NOT damaged and can continue to produce
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