Functions of Parts of The Eye

Question 1

Cornea

Answer 1

Refracts light

Question 2

Iris

Answer 2

Controls how much light enters the pupil

Question 3

Iris

Answer 3

Controls how much light enters the pupil

Question 4

Lens

Answer 4

Focuses light on to the retina

Question 5

Retina

Answer 5

Contains light receptors, some sensitive to light of different colours

Question 6

Optic nerve

Answer 6

Carries impulse to the brain

Question 7

What happens to the circular and radial muscles when the pupil constricts

Answer 7

the radial muscle relaxes while circular muscle contracts

Question 8

When the eye is exposed to bright light, will the pupil constrict or dilate

Answer 8

It will constrict

Question 9

Which two muscles make up the iris

Answer 9

Radial muscles and circular muscles

Question 10

What is the purpose of the iris reflex

Answer 10

To ensure the optimum amount of light enters the eye

Question 11

What is the purpose of the iris reflex

Answer 11

To ensure the optimum amount of light enters the eye

Question 12

The point where light focuses on the retina is called the _____

Answer 12

Fovea

Question 13

Which light sensitive cells in the retina enable you to see in the dark?

Answer 13

Rod cells

Question 14

Which light sensitive cells in the retina enable you to see in colour

Answer 14

Cone cells

Question 15

What are the names of the two types of receptor cells in the retina

Answer 15

Cone cells and rod cells