chapter 1: epithelium background Flashcards

1

1
Q

General fxns of epithelium

A

absorption
secretion
provide barrier

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2
Q

Specialized fxns of epithelium

A

transport molecules across epithelium
prevent transport of materials across epithelium (selective permeable)
sensory

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3
Q

basic characteristics of epithelium

A

cells adjacent to one another

associated with complete OR partial basement membrane

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4
Q

2 parts of basement membrane

A

basal lamina

reticular lamina

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5
Q

basal lamina produced by

A

epithelium

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6
Q

reticular lamina produced by

A

fibroblasts in CT

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7
Q

partial basement membrane is composed of

A

basal lamina only

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8
Q

functions of basement membrane

A

provide surface for epithelial cell attachment
molecular filter
limits stretch
directs migration of cells

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9
Q

epithelium is _______, cells obtain nutrition via ______

A

avascular

diffusion

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10
Q

CT is associated with epithelium and provides:

A

nutrition

source of defensive cells

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11
Q

tight junction

A

zonula occludens

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12
Q

junction that involve the sharing of intrinsic membranes between adjacent cells

A

zonula occludens

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13
Q

junction that provides strong attachment and PREVENTS passage of material between cells

A

zonula occludens

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14
Q

adhesion belt

A

zonula adherens

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15
Q

junction that consists of regions of:

  • cadherins
  • marginal bands (microfilaments): attach cytoskeleton to cell membrane at these areas
A

zonula adherens

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16
Q

junction that provides strong attachment and cell structural stability

A

zonula adherens

17
Q

junction that provides strong attachment

A

macula adherens

18
Q

six connexins (proteins) arranged in cylinder. size of opening is controlled by cell

A

gap junctions

19
Q

junction with functions: strong attachment & transport material between cells

A

gap junctions

20
Q

Junctional complex is in simple epithelium in the following order w. the free cell surface:

A

zonula occludens
zonula adherens
macula adherens

21
Q

help to connect epithelial cells to the basal lamina; 1/2 desmosome

A

hemidesmosome

22
Q

integrin binds to structural CT glycoproteins and also connects to cytoskeleton

A

focal point contacts