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GCSE CCEA Biology Unit 1 > Coordination and Control: the Eye 👁️ > Flashcards

Coordination and Control: the Eye 👁️ Flashcards

1
Q

Near object

A

More refraction

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2
Q

Far object

A

Less refraction

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3
Q

Refraction

A

Bending of light rays

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4
Q

Ciliary muscle - near object

A

Contracted

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5
Q

Suspensory ligaments - NEAR OBJECT

A

Slack / relaxed

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6
Q

Lens shape - NEAR OBJECT

A

Rounded

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7
Q

Ciliary Muscles - DISTANT OBJECT

A

Relaxed

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8
Q

Suspensory Ligaments - DISTANT OBJECT

A

Taut / Contracted

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9
Q

Lens shape - DISTANT OBJECT

A

Long & thin

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10
Q

conjunctiva ☔️ 🗡️

A

A protective transparent covering that stops dust and dirt damaging the cornea. It also keeps the cornea moist.

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11
Q

cornea💡

A

Transparent part of the sclera that allows light to enter the eye

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12
Q

pupil

A

The opening in the middle of the iris through which light
Passes

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13
Q

Iris

A

Consists of muscles that contract and relax to control the size of the pupil

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14
Q

Lens

A

This bends (refracts) light and focuses light rays on the retina

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15
Q

retina

A
  • This contains the receptor cells that are sensitive to light.
  • The central part of the retina (the fovea) contains a lot of light sensitive is receptors and is particularly sensitive
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16
Q

optic nerve

A

Contains sensory neurones that link the retina to the brain by carrying electrical impulses.

17
Q

💦 aquacous huMerous 💦

A
  • watery fluid in the front part of the eye
  • keeps the eye at the right pressure
  • allows light rays to pass through
18
Q

🍧💦 vitreous humerous 🍧💦

A
  • jelly-like 🍧 fluid
  • between the lens and the retina
  • keeps the eye spherical
  • keeps the lens and the retina the correct distance apart for focusing light rays
  • allows light rays to pass through
19
Q

choroid

A

choroid
black layer containing lots of blood vessels

GCSE CCEA Biology Unit 1 (10 decks)

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