Anat/phys/biochem Lab 2 - Histology Of The Cornea, Limbus And Filtration App

Front 1

This layer is smooth, regular non-keratinized stratified squamous epithelium.

Back 1

Cornea Epithelium

Front 2

The cornea epithelium is composed of what type of epithelium?

Back 2

A smooth regular non-karatinized stratified squamous epithelium

Front 3

What layer of the cornea has of squamous cell, wing cells and columnar basal layer cells?

Back 3

the surface layer of the corneal epithelium

Front 4

What structure has surface cells that are continuously cast off into the tear film and replaced by growth from below through mitosis of the basal cells

Back 4

Corneal epithelium

Front 5

How does the corneal epithelium form new cells?

Back 5

mitosis of basal cells

Front 6

T/F

The corneal epithelium is continuous with the conjunctival epithelium

Back 6

T

Front 7

T/F

The thin basement membrane which underlies and supports the epithelium is visible with the light microscope

Back 7

F

The thin basement membrane which underlies and supports the epithelium is not visible w/ the light microscope

Front 8

This is an acellular collagenous layer that underlies the corneal epithelium and end at the limbus

Back 8

Bowman's Layer

Front 9

T/F

The Boman's Layer is an acellular collagenous layer that underlies the corneal epithelium and ends at the ciliary bodies

Back 9

F

Bowman's layer ends at the limbus

Front 10

T/F

Bowman's layer does regenerate when damaged and degenerates in some corneal dystrophies

Back 10

F

Bowman's layer does not regenerate

Front 11

T/F

Anteriorly, the fibers of Bowman's continue into the stroma

Back 11

F

Posteriorly, the fibers of Bowman's continue into the stroma

Front 12

What layer is regular dense connective tissue that is composed of uniform collagen fibers arranged into budles, lamelle.

Back 12

Stroma

Front 13

T/F

The stromal bundle and lamelle fibers parallel the posterior surface of the cornea

Back 13

F

The stromal bundle and lamella fibers parallel the anterior surface of the cornea

Front 14

What are the fibroblastic cells called that lie b/t the lamellae of the stroma?

Back 14

Keratocytes

Front 15

Which cells synthesisze collagen?

Back 15

Keratocytes

Front 16

T/F

Lamellae lie in the stroma which normally is separated in areas where the keratocytes live

Back 16

F

Lamellae bundles are closely adjacent to one another throughout their length

Front 17

T/F

The transparency of the corneal stroma depends on the regularity of size and arrangement of collagen fibrils

Back 17

T

Front 18

T/F

Stromal cells and fibrils do not regenerate after damage and will form a scar

Back 18

F

Stromal cells and fibrils DO regenerate after damage, but may leave a scar

Front 19

What layer of the cornea is the basement membrane of the endothelium and lies b/t the stroma and endothelium?

Back 19

Descemet's membrane

Front 20

T/F

If Descemet's membrane is damaged regeneration does occur w/ the endothelium secreting Descemet's

Back 20

T

Front 21

T/F

Descemet's membrane does not regenerate if damaged

Back 21

F

if damaged, regeneration does occur w/ the endothelium secreting Descemet's

Front 22

T/F

The termination of Descemet's membrane in the central cornea often forms a thickening called Schwalb's line

Back 22

F

The termination of Descemtet's membrane in the periphery often forms a thickening called Schwalbe's line

Front 23

What structure is located at the apex of the trabecular meshwork

Back 23

Schwalbe's line

Front 24

T/F

Schwalbe's line is located at the apex of the ciliary bodies

Back 24

F

Schwalbe's .line is located at the apex of the trabecular meshwork

Front 25

T/F

Endothelim is a single-cell layer of flat epithelial cells covers the posterior surface of the cornea

Back 25

T

Front 26

The endothelium is continuous beyond Schwalbe's line w/ the cells covering the sheets of what structure?

Back 26

the Trabecular meshwork

Front 27

T/F

Mitosis normally occurs in the endothelium where the surface cells are continuously cast off and being replaced by growth from below through mitosis

Back 27

F

mitosis normally does not occur in the endothelium

Front 28

T/F

After injury to endothelium, the cells spread out and thin to cover the defect

Back 28

T

Front 29

What type of conjunctiva is apparent where the conjunctival epithelium is continuous w/ and becomes more irregular then the corneal epithelium?

Back 29

Limbus conjunctiva epithelium

Front 30

What type of conjunctiva is apparent where loose connective tissue layer lies just inner to the epithelium and contains the conjunctival blood vessels?

Back 30

stroma

Front 31

Where do you often see melanocytes?

Back 31

Limbus

Front 32

What structure in the limbus does a dense connective tissue layer lie just b/t the conjunctival stroma and episclera

Back 32

Tenon's capsule

Front 33

T/F

Tenon's capsuel can be easily identified with the light microscope

Back 33

F

Tenon's capsule is difficult to ID w/ the light microscope

Front 34

What structure is just inner to the conjunctival stroma

Back 34

Tenon's capsule lies just inner to conjunctival stroma

Front 35

T/F

The episclera is avascular so that it is transparent

Back 35

F

episclera is vascular and lies just tot outer side of sclera

Front 36

What layer is sometimes considered the superficial sclera and is composed of loose, vascular, connective tissue?

Back 36

Episclera

Front 37

T/F

The sclera is even, uniform and is relatively avascular thus leading to its transparency

Back 37

F

The sclera is irregularly dense CT and is relatively avascular

Front 38

In what structure does the collagen fibrils arrange in an irregular, interwoven network that gives the sclera considerable tensile strength

Back 38

Sclera

Front 39

T/F

Numerous ciliary blood vessels and nerves pass though the optic disc, but most of them do not branch into the sclera itself, they just pass though

Back 39

F

Numerous ciliary BV an nerves pass though the sclera, but most of them do not branch int the sclera itself, they are just passing though

Front 40

T/F

At the limbus the scleral collagen fibrils become increasingly regular in their arrangement and continue into the conjunctival and corneal stromal fibrils

Back 40

F

At the limbus the sclerak cillagen fibrils become increasingly regular in their arrangemetn and continue into the CORNEA stromal fibrils

Front 41

what structure has a ring shaped structure of compact thick scleral fibers extending from the sclera at the posterior of the internal scleral sulcus

Back 41

Scleral spur

Front 42

T/F

The scleral spur is part of the sclera that sticks up and has the apperance of a spur when cut in ccross section

Back 42

T

Front 43

T/F

The longitudinal ciliary muscle fibers attach to the anterior of the scleral spur and some of the sheets of the trabecular meshwork where some of the sheets attach to the anterior

Back 43

F

The longitudinal ciliary muscle fibers attach to the POSTERIOR of the scleral spur and some of the sheets of the trabecular meshwork attached to the anterior

Front 44

What two structures make up the filtration apparatus?

Back 44

trabecular meshwork
canal of Schlemm

Front 45

T/F

The trabecular meshwork is triangular shapped

Back 45

T

Front 46

What is the circular structure that surrounds the anterior chamber at the corneo-sclera junction?

Back 46

Trabecular meshork

Front 47

T/F

In cross section, trabecular meshwork is roughly triangular in shape w/ the apex of the triangle at the scleral spur.

Back 47

F, apex of triangle at schwabe's line

Front 48

T/F

At the scleral spur, one face is lining the anterior chamber and the other is lying against the iris

Back 48

F

At the scleral spur, one face is lining the anterior chamber, and the other face lying against the sclera.

Front 49

T/F

The Canal of Schlemm the circular vessel lies just outer to the meshwork

Back 49

T

Front 50

T/F

The lumen of the canal of Schlemm is lined with epithelium

Back 50

F

The lumen of the canal of Schlemmis lined with endothelial cells