05a. The structures and functions of the eye

Question 1

What is (1)?

Answer 1

optic nerve/s

Question 2

What is (2)?

Answer 2

optic disc/**blind spot **

Question 3

What is (3)?

Answer 3

**Fovea **
(high concentration of Cones)

Question 4

What is (4)?

Answer 4

Retina

Question 5

What is (5)?

Answer 5

Sclera

Question 6

What is (7)?

Answer 6

Ciliary muscles

Question 7

What is (8)?

Answer 7

Lens

Question 8

What is (9)?

Answer 8

Cornea

Question 9

What is (10)?

Answer 9

Pupil

Question 10

What is (11)?

Answer 10

Aqueous Humour

Question 11

What is (12)?

Answer 11

Iris

Question 12

What is (14)?

Answer 12

Vitreous humour

Question 13

What is the function of the cornea?

Answer 13

protects the eye and helps to focus light rays on the retina

Question 14

What is the function of the aqueous and vitreous humour?

Answer 14

Provide structure/shape to the eye and provide nutrients (e.g. oxygen) to eye structures.

Question 15

What is the function of the iris?

Answer 15

contains muscles that control the size of the pupil

Question 16

What is the function of the pupil?

Answer 16

an opening in the iris that helps control the amount of light entering the eye (dilates or constricts)

Question 17

What is the function of the lens?

Answer 17

focuses light onto the retina, by adjusting its shape according to the distance of the object being viewed (bulges – to focus on nearby objects; flattens – to focus on distant objects)

Question 18

What is the function of the ciliary muscles?

Answer 18

control the shape of the lens.

Question 19

What is the function of the retina?

Answer 19

Contains photoreceptors (rods and cones). Receives and absorbs lights and processes images.

Question 20

What is the function of Rods?

Answer 20

respond to very low levels of light
responsible for night-vision and peripheral vision.
sensitive to movement

Question 21

What is the function of Cones?

Answer 21

respond to high levels of light (and do not respond well to dim levels of light).
Detect fine detail and are involved in colour vision.

Question 22

What is the function of the optic nerve/s?

Answer 22

transmits the visual information from the retina to the primary visual cortex of the brain (Transmission)

Question 23

Which structure protects the eye and helps to focus light rays on the retina?

Answer 23

Cornea

Question 24

Which two parts of the eye provide structure/shape to the eye and provide nutrients to eye structures?

Answer 24

aqueous and vitreous humour

Question 25

Which structure contains muscles that control the size of the pupil

Answer 25

Iris

Question 26

Which structure helps control the amount of light entering the eye (dilates or constricts)

Answer 26

Pupil

Question 27

Which structure focuses light onto the retina, by adjusting its shape according to the distance of the object being viewed

Answer 27

Lens

Question 28

Which structure controls the shape of the lens?

Answer 28

ciliary muscles

Question 29

Which structure receives and absorbs lights and processes images?

Answer 29

Retina

Question 30

Which photoreceptors respond to very low levels of light responsible for night-vision and peripheral vision. sensitive to movement

Answer 30

Rods

Question 31

Which photoreceptors respond to high levels of light (and do not respond well to dim levels of light). Detect fine detail and are involved in colour vision.

Answer 31

Cones

Question 32

Which structure transmits the visual information from the retina to the primary visual cortex of the brain?

Answer 32

Optic nerve/s