The Senses

Question 1

What are the five senses?

Answer 1

Touch
Taste
Smell
Sight
Hearing

Question 2

How do the senses work?

Answer 2

Based on receptor cells

Question 3

What stimuli does the skin react to?

Answer 3

Touch and temperature

Question 4

What are receptors for taste?

Answer 4

Taste buds

Question 5

What are the four basic taste receptors ?

Answer 5

Sweet, salty, sour and bitter

Question 6

What is special about nose smell receptors?

Answer 6

They are extremely sensitive and adjust quickly to a smell and stop responding

Question 7

What is the conjunctiva?

Answer 7

Membrane around the eye. Protects the eye

Question 8

What is the sclera ?

Answer 8

Tough, white coat that holds the eye in shape

Question 9

What is the cornea?

Answer 9

The front part of the sclera. It allows light into the eye and bends it to help focus on the retina

Question 10

What is the choroid?

Answer 10

Nourishes the eye and prevents internal reflection of light, nourished by blood vessels

Question 11

What is the retina?

Answer 11

Light sensitive. Contains light receptors, rods (black and white vision) and cones (colour vision)

Question 12

What is the fovea/yellow spot?

Answer 12

Part of the retina where images are focused

Question 13

What is the blind spot?

Answer 13

Where the optic nerve leaves the retina. It has no comes or rods = zero vision

Question 14

What is the function of the optic nerve?

Answer 14

Carries impulses to the brain

Question 15

What is the function of the lens?

Answer 15

Focuses light on the retina

Question 16

What is the function of the ciliary muscle?

Answer 16

Changes the shape of the lens

Question 17

What is the function of the iris?

Answer 17

Coloured part of the eye. Controls amount of light entering the eye.

Question 18

What is the function of the pupil?

Answer 18

Black circle at the front of the eye. Lets light into the eye

Question 19

What is the function of the aqueous humor?

Answer 19

Keeps the eye in shape

Question 20

What is the function of the vitreous humor?

Answer 20

Keeps the eye in shape

Question 21

What is the function of the external muscle?

Answer 21

The eye is moved by six external muscles

Question 22

What are features of cones?

Answer 22

• 6 million (each eye)
• Detect colour
• Work in bright light only
• Mostly found in the fovea

Question 23

What are features of rods?

Answer 23

• 120 million (each eye)
• Detect black and white
• Work in dim light only
• Found all over retina

Question 24

What does bright light do to the eyes?

Answer 24

Reduces pupil size to reduce too much light entering the eye

Question 25

What does dim light do to the eyes?

Answer 25

Increases pupil size to allow as much light as possible to enter the eye

Question 26

What is a sight disorder and a corrective measure for it?

Answer 26

- Short sighted - Can’t see distant objects - Laser eye surgery

Question 27

What lens is needed for short sighted?

Answer 27

Concave lens

Question 28

What lens is needed for long sighted?

Answer 28

Convex lens

Question 29

What are the main functions of the ear?

Answer 29

Hearing and balance

Question 30

What are the three sections of the ear?

Answer 30

Outer, middle and inner ear

Question 31

What fluid fills the inner ear?

Answer 31

Lymph

Question 32

What causes sound?

Answer 32

Vibrations in the air

Question 33

What is the function of the pinna?

Answer 33

Collects vibrations

Question 34

What is the function of the auditory canal?

Answer 34

Carries vibrations to the eardrum

Question 35

What is the function of the eardrum?

Answer 35

Carries vibrations to the middle ear

Question 36

What are the ossicles?

Answer 36

Hammer, anvil and stirrup

Question 37

What is the function of the ossicles?

Answer 37

Amplify the vibrations and pass them on top the oval window

Question 38

What is the function of the Eustachian tube?

Answer 38

Equalises pressure between the middle and outer ear

Question 39

What is the function of the cochlea?

Answer 39

Converts vibrations into electrical impulses that are sent to the brain along the auditory nerve

Question 40

What detects balance in the ear?

Answer 40

The vestibular apparatus

Question 41

What does the vestibular apparatus consist of?

Answer 41

Three semicircular canals

Question 42

What is the vestibular apparatus filled with?

Answer 42

Lymph

Question 43

What is an ear disorder and it’s corrective measure?

Answer 43

- Glue ear - Too much sticky fluid in the middle ear - Grommets