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Sp1-e1 > Histo Capt ONE > Flashcards

Histo Capt ONE Flashcards

1
Q

What are the 3 types of epithelium ?

A

Absorption, secretion, provide a barrier.

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2
Q

What are the characteristics of epithelium ?

A

Cells are adjacent to each other.

Has complete or partial basement layer.

It is avascular ( obtain nutrition by diffusion)

Associated with avascular ct

Cells are held together by cell junctions

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3
Q

Basal lamina is produced by what?

A

Epithelium

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4
Q

Reticular lamina is produced by fibroblast where?

A

Connective tissue

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5
Q

A partial basement membrane is composed of what?

A

Basal lamina only

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6
Q

What are the 4 functions of the basement membrane ?

A

Provides a surface for epithelial cell attachment, can function as a molecular filter (very limited), limits stretch, directs migration of cells.

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7
Q

Associated with vascular connective tissue, it provides_____ and is a source of__________?

A

Nutrition, defensive cells.

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8
Q

What is another name for Zonula Occludens?

A

Tight junctions.

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9
Q

How does epithelium obtain nutrition?

A

Diffusion

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10
Q

Is epithelium vascular or avascular ?

A

Avascular

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11
Q

What are two functions of Zonula occludens?

A

Provides a strong attachment and prevents the passage of materials between cells

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12
Q

What type of junction involve the sharing of intrinsic membrane (interacting) proteins BETWEEN adjacent cells?

A

Tight junctions

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13
Q

What type of junction consist of linkage proteins between cells and marginal bands which attach the cytoskeleton to the cell membrane at the same area?

A

Zonula Adherens (adhesion belt)

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14
Q

What are two functions of Zonula Adherens ?

A

Strong attachment and provide cell structural stability

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15
Q

List in order the junctional complex

A
  1. Zonula Occludens. 2. Zonula adherents. 3. Macula adherents.
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16
Q

What helps to connect epithelial cells to the basal lamina essentially half a desmosome?

A

Hemidesosome

17
Q

What is it called when Intergin binds to structural CT glycoproteins and also connects to cytoskeleton

A

Focal point contacts

18
Q

What are the 3 major components of a desmosome?

A

Protein plaque, tonofilaments, transmembrane protein.

19
Q

What’s is the function of macula Adherens(desmosome)?

A

Provides strong attachment

20
Q

What are two functions of gap junctions ?

A

Strong attachment, TRANSPORT MATERIALS BETWEEN CELLS.

21
Q

What junction is six proteins arranged in a cylinder. The size of the openings can can be controlled by the cell. A connection = 1 complete structure

A

GAP junctions

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