chapter 1: epithelium background Flashcards
1
General fxns of epithelium
absorption
secretion
provide barrier
Specialized fxns of epithelium
transport molecules across epithelium
prevent transport of materials across epithelium (selective permeable)
sensory
basic characteristics of epithelium
cells adjacent to one another
associated with complete OR partial basement membrane
2 parts of basement membrane
basal lamina
reticular lamina
basal lamina produced by
epithelium
reticular lamina produced by
fibroblasts in CT
partial basement membrane is composed of
basal lamina only
functions of basement membrane
provide surface for epithelial cell attachment
molecular filter
limits stretch
directs migration of cells
epithelium is _______, cells obtain nutrition via ______
avascular
diffusion
CT is associated with epithelium and provides:
nutrition
source of defensive cells
tight junction
zonula occludens
junction that involve the sharing of intrinsic membranes between adjacent cells
zonula occludens
junction that provides strong attachment and PREVENTS passage of material between cells
zonula occludens
adhesion belt
zonula adherens
junction that consists of regions of:
- cadherins
- marginal bands (microfilaments): attach cytoskeleton to cell membrane at these areas
zonula adherens