The Senses (chpt. 34) Flashcards
Name the 5 senses
Touch
Sight
Taste
Smell
Hearing
What receptors are found on the skin
Pain touch temperature
What is a blind spot
Part of eye with no rods or cones
Role of pupil in eye
Lets light in
Where in the eye are rods and cones located
The retina
Difference between rods and cones
RODS
- black & white
- work in dim light
CONES
- colours
- bright light
What is detected by the tongue
Taste
Name the four tastes the tongue is sensitive to
Sweet sour salt bitter
What in the nose detects smell
Olfactory neurons
Name a hearing disorder and corrective measure
Glue ear - grommets
Name a vision disorder and a corrective measure
Long / short sighted - laser eye surgery
What is the outer ear (pinna) composed of
Cartilage
Explain the function of the outer ear (pinna)
Collects and channels vibrations
Name one part of the body that protects the ear
Skull
How can manual labourers such as construction workers avoid permanent hearing loss when using loud machinery
Use ear protection
Why can damage to the optic nerve result in blindness?
No impulses will be sent to the brain
How is the eye protected from external damage
Eyelid
Skull
Name the part of the eye that contains a large amount of blood vessels
Choroid
What is the smallest bone in the body
Stirrup in middle ear
Which type of light receptors are responsible for colour vision
Cones
Describe the function of the Eustachian tube in the ear
Equalise pressure
Describe the function of the semi-circular canals in the ear
Control balance
Describe the function of the optic nerve
Send impulses from the eye to the brain
Explain why cataracts can lead to blindness
Can prevent light entering the eye (as the lens is no longer transparent)
What is a reflex action
Automatic/ involuntary response to a stimulus
Which part of the brain co-ordinates messages from the semi-circular canals
Cerebellum
Suggest an advantage to humans of having two eyes
Depth perception
Name the fluid that fills the rear chamber of the eye and give its function
Vitreous humour
Gives shape
Where is the blind spot located
Where the optic nerve enters the eye
Name the part of the eye that contains light receptor cells
Retina
Name a part of the ear that has a function similar to that of the stirrup
Hammer or anvil
What are the ossicles
Three tiny bones in middle ear - hammer, anvil, stirrup
Name the structure in the eye that determines the diameter of the pupil
The iris
Function of the choroid layer
Prevent reflection of light within the eye
Good blood supply
Causes of hearing loss
Prolonged exposure to loud noise / music
Drugs
Infections
Explosions
Advantages of having two eyes
- 3D vision
- depth perception
- in case one gets damaged
