the eye

Question 1

cornea

Answer 1

transparent lens that refracts light as it enters

Question 2

iris

Answer 2

controls how much light enters the pupil

Question 3

lens

Answer 3

transparent disc that can change shape to focus light onto retina

Question 4

retina

Answer 4

contains light receptor cells
- rods: detect light intensity
- cones: detetcs colour

Question 5

optic nerve

Answer 5

sensory neurones that carries impulses between the eye and the brain

Question 6

pupil

Answer 6

hole that allows light to enter the eye

Question 7

cilliary muscles

Answer 7

ring of muscle that contracts and relaxes to change the shape of the lens

Question 8

suspensory ligaments

Answer 8

ligaments that connect the cilliary muscle to lens

Question 9

sclera

Answer 9

strong outer wall of eyeballl that helps keep the eye in shape and provides a place of attachement for the muscles

Question 10

fovea

Answer 10

region of retina with highest density of cones where eye sees good details

Question 11

aqueous humour

Answer 11

watery liquid between cornea and lens

Question 12

vitreous humour

Answer 12

jelly like liquid filling the eyball

Question 13

choroid

Answer 13

pigmented layer of tissue lining the inside of the sclera that prevents the reflection of light rays inside the eyeball

Question 14

blind spot

Answer 14

point at which optic nerve leaves the eye, where there are no receptor cells