unit 4- The Sensory System

Question 1

What is the role of the pupil in the eye?

Answer 1

It is the opening in the middle of the eye through which light passes through.

Question 2

What part is the middle of the eye?

Answer 2

Pupil

Question 3

What is the role of the iris in the eye?

Answer 3

It is the visible coloured ring that adjusts to control the amount of light entering through the pupil.

Question 4

What part of the eye is the visible coloured ring?

Answer 4

Iris

Question 5

What is the role of the cornea in the eye?

Answer 5

It is the transparent part at the front of the eye which is protected by the conjunctiva.

Question 6

What part of the eye is protected by the conjunctiva?

Answer 6

Cornea

Question 7

What is the role of the retina in the eye?

Answer 7

The inner lining of the eye that contains rods and cones.

Question 8

What is the role of the lens in the eye?

Answer 8

It focuses light entering the eye.

Question 9

What is the role of the optic nerve?

Answer 9

Where the nerve cells exit the eye to the brain.

Question 10

What part of the eye allows nerve cells to exit the eye to the brain?

Answer 10

Optic nerve

Question 11

What’s the outside of the eye called?

Answer 11

Sclera

Question 12

What is the role of the sclera?

Answer 12

It is the tough outer coating of the eye and protects it.

Question 13

What are the benefits of tear glands?

Answer 13

Help to keep the outer layer of the eye moist

Question 14

What does the movement of the iris cause?

Answer 14

The pupil to change size

Question 15

What is attached to the lens in the eye?

Answer 15

Ciliary muscles

Question 16

What are the cones responsible for in the retina?

Answer 16

They are responsible for vision in light conditions and allow us to view colours and give precise vision.

Question 17

What are the rods responsible for in the retina?

Answer 17

They are responsible for vision at lower light.
They cannot detect colour.

Question 18

What is the macular?

Answer 18

The central part of our retina

Question 19

What is the role of the macular?

Answer 19

It is responsible for providing 20/20 vision.
It is also the part of the eye where the cones are concentrated.

Question 20

What are the 4 malfunctions of the eye?

Answer 20

Glaucoma
Cataracts
Retinopathy
AMD (age related macular degeneration)

Question 21

What is the cause of glaucoma?

Answer 21

It is caused by the build of pressure in your eye which is caused by the vitreous fluid building up and not draining properly. This fluid ends up pressing on the optic nerve destroying it and resulting in blindness.

Question 22

What are the risk factors of glaucoma?

Answer 22

Age
High blood pressure
Genetic link

Question 23

What’s the treatment of glaucoma?

Answer 23

The use of eye drops to open up tiny drainage channels within the eye.

Question 24

What are the symptoms of glaucoma?

Answer 24

Blurred vision
Eye pain

Question 25

What is cataracts?

Answer 25

They are cloudy patches of protein that develop in the lens of the eye causing blurred vision as light cannot hit the retina effectively.

Question 26

What are the risk factors of cataracts?

Answer 26

Age Smoking

Question 27

What is the treatment for cataracts?

Answer 27

Surgery to remove and replace the affected lens.

Question 28

What are the symptoms of cataracts?

Answer 28

Blurred vision Difficulty seeing in low light Halos around eyes

Question 29

What is retinopathy linked to?

Answer 29

Diabetes

Question 30

What is the cause of retinopathy?

Answer 30

High blood sugar levels damage the cells of the retina by weakening the small vessels causing them to leak.

Question 31

What is the treatment for retinopathy?

Answer 31

Lifestyle treatments: diet treatment for diabetes Regular eye exams

Question 32

What are the symptoms of retinopathy?

Answer 32

Blurred vision Floaters in field of vision

Question 33

What is AMD?

Answer 33

It is a painless eye condition that results in the loss of central vision.

Question 34

What are the two types of AMD?

Answer 34

Dry AMD Wet AMD

Question 35

What is dry AMD?

Answer 35

cells in the macula become damaged due to deposits of drusen.

Question 36

What is wet AMD?

Answer 36

abnormal blood vessels form underneath the macula and damage its cells.

Question 37

What does AMD stand for?

Answer 37

Age related macular degeneration

Question 38

What are the risk factors of AMD?

Answer 38

Age

Question 39

What is the treatment of AMD?

Answer 39

Medication such as eye drops laser eye surgery

Question 40

What are the symptoms of AMD?

Answer 40

Blurred central vision straight lines appear wavy Faded colour Hallucinations

Question 41

What are the three main functions of the ear?

Answer 41

Hear sound Detect motion Maintain balance

Question 42

What are the three main sections of the ear?

Answer 42

External Middle Inner

Question 43

What is the pinnae?

Answer 43

An outside part of an ear which allows sound waves to pass through the ear and channeled.

Question 44

Where do sound waves pass down when entering the ear?

Answer 44

The external ear passage.

Question 45

What does sound waves passing down the external ear passage cause to happen?

Answer 45

The ear drum to vibrate at the end.

Question 46

What is the ear drum vibrating allowed to happen?

Answer 46

As the drum separates the the middle ear from the external ear.

Question 47

What connects the middle ear to the throat?

Answer 47

Eustachian tube.

Question 48

What is the malfunction of the ear?

Answer 48

Deafness

Question 49

When do most people experience deafness?

Answer 49

Some people are born without hearing but most cases is a result of an illness.

Question 50

What are the 2 main types of hearing loss?

Answer 50

Conductive hearing loss Sensorineural hearing loss.

Question 51

What is conducive hearing loss?

Answer 51

When sounds are unable to pass from the outer ear to the inner ear, ussually because of a blockage.

Question 52

What is Sensorineural hearing loss caused by?

Answer 52

The damage to the sensitive hair cells of the organ of Corti in the inner ear, or damage to the auditory nerve.

Question 53

What are the symptoms of hearing loss?

Answer 53

Difficulty hearing other people clearly Asking people to repeat themselves Finding it hard to keep up with a conversation

Question 54

What are the treatments of hearing loss?

Answer 54

Hearing aids Implants Could be treated using antibiotics or ear drops if not severe.