Coordination and response - the eye

Question 1

sclera

Answer 1

tough outer coat of the eye. it protects the eye

Question 2

Cornea

Answer 2

lets light into the eye and refracts it a bit

Question 3

Iris

Answer 3

colored pigment of the eye and controls how much light enters the eye

Question 4

Pupil

Answer 4

a hole in the middle of the eye that lets light in

Question 5

Choroid

Answer 5

underneath the sclera. It contains many pigments that absorb light to stop it from reflecting around the eye

Question 6

Retina

Answer 6

a light sensitive layer which contains photoreceptor cells

Question 7

Rods and cods

Answer 7

cells that react to light producing small nerve impulses in sensory neurons

Question 8

Optic nerve

Answer 8

sensory neurons pass the impulses to the brain

Question 9

Lens

Answer 9

change shape to refract the light correctly to the fovea

Question 10

Fovea

Answer 10

area of the retina with high concentration of rod and cone cells that provide sharp vision

Question 11

Aqueous humour

Answer 11

maintains the pressure of the eye and nourishes the cornea

Question 12

Vitreous humour

Answer 12

keeps the shape of the eye

Question 13

Ciliary muscles

Answer 13

controls the shape of the lens so that we can see near or far

Question 14

near

Answer 14

1. ciliary muscles contract
2. suspensory ligaments slacken
3. lens become fatter

Question 15

far

Answer 15

1. ciliary muscles relax
2. suspensory ligaments contract
3. lens become thinner

Question 16

dark

Answer 16

1. circulatory muscles relax
2. radial muscles contract
3. Pupils dilate

Question 17

light

Answer 17

1. circulatory muscles contract
2. radial muscles relax
3. pupis constrict