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Head and neck > Histology Eye > Flashcards

Histology Eye Flashcards

1
Q

Why is the cornea transparent

A

Avascularized

Fibers arranged in the same direction

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2
Q

Function of sclera

A

Protection
Suppor
Keeping the shape
Attachment to muscles

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3
Q

Ciliary body composed of

A

Pigmented epithelium

Non pigmented epithelium

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4
Q

What structure protects the eye against UV radiation

A

Pigmented epithelium of ciliary bodies

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5
Q

What structure produces aqueous humor

A

Non-pigmented epithelium of ciliary bodies

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6
Q

Blood-aqueous barrier made by what strucutre

A

Ciliary bodies

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7
Q

What controls intraocular pressure

A

Aqueous humor

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8
Q

What structure reabsorbs aqueous humor

A

Schlemn canal

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9
Q

Iris is connected to what structure

A

Lens

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10
Q

Retina sits on top of

A

Retinal pigmented epithelium

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11
Q

What forms the retina

A

Photoreceptors

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12
Q

Effect of light hitting the retina

A

Hyperpolarization

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13
Q

Rodes (photoreceptors) contain

A

Rhodopsin

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14
Q

Cones (photoreceptors) contain

A

Iodopsin

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15
Q

Outer layer of retina made of

A

Photoreceptors

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16
Q

Cones and rodes (photoreceptors) are sitted on

A

The retinal pigmented epithelium

17
Q

Function of retinal pigmented epithelium in relation to photorecptors

A

Protect them

18
Q

What happens to photoreceptors during sleep

A

The part of photoreceptors which is not protected by retinal pigmented epithelium will be regenerated

19
Q

Which vitamin is important in regeneration of photoreceptors

A

Vitamin A, in charge of creating rhodopsin again

Head and neck (7 decks)

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