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Biology Matric > Human Eye > Flashcards

Human Eye Flashcards

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1
Q

Conjunctiva

A

Delicate mucous mem
Lube
Pain receptors

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2
Q

Sclera

A

Tough white in elastic
Protection
Maintain shape

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3
Q

Cornea

A

Transparent
Allows light pass
Causes converging refraction

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4
Q

Choroid

A

Thin dark layer
Absorbed excess rays
Blood vessels supply food to retina

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5
Q

Ciliary body

A

Circular ciliary muscles

Control curvature of lens

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6
Q

Iris

A

Circular and radial iris’s
Light =circular contracts
Dark=circular relaxes

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7
Q

Pigmented layer

A

Pigment absorb light

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8
Q

Photoreceptors

A

Rods and cones

Convert light stimuli

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9
Q

Rods

A

Low intensity light

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10
Q

Cones

A

Respond to bright light

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11
Q

Blind spot

A

No receptors

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12
Q

Yellow spot

A

Mainly cones

Very good sight

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13
Q

Lens

A

Changes shape to focus light rays

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14
Q

Anterior cavity

A

Aqueous humour
Nutrient and o2 to lens and cornea
Remove waste

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15
Q

Posterior cavity

A

Vitreous humour
Keep pressure
Prevent collapse

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Biology Matric (8 decks)

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