Tema 2 Sensitivity Definitions

Question 1

Pupil

Answer 1

Is a hole in the center of the iris. Light enters through the eye here.

Question 2

Lens

Answer 2

Helps the eye to focus the light

Question 3

Retina

Answer 3

Captures the light and produces an image

Question 4

Iris

Answer 4

Controls the amount of light that enters the pupil

Question 5

Optic nerve

Answer 5

Carries impulses to the brain from the retina

Question 6

Pinna

Answer 6

Captures sound in form of vibrations

Question 7

Ear canal

Answer 7

The vibrations travel along the air canal

Question 8

Eardrum

Answer 8

Makes the three small bones vibrate

Question 9

Small bones

Answer 9

The small bones make the cochlea vibrate

Question 10

Cochlea

Answer 10

The cochlea transforms these vibrations into signals

Question 11

Auditory nerve

Answer 11

Carries signal to brain from cochlea

Question 12

Taste

Answer 12

We taste to detect flavours.

There are many small receptors on your tongue called taste buds that detect different flavours.

Question 13

Sense of touch

Answer 13

The skin contains touch receptors which detect information and send this information to your nerves. The skin has two main layers.

• The epidermis: This is the outside layer
• The dermis: This layer contains the nerve endings.

Question 14

Sense of Smell

Answer 14

We smell to detect smells.

• Nostril
• Nasal Cavity
• Olfactory ephitelium
• Olfactory nerve