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Unit 4
LO6: Sensory Systems
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Cards (50)
What is the sclerotic coat also known as?
The
'white of the eye'
What is the role of the cornea in the eye?
It is the
transparent
layer at the front that allows light to enter
What is the
conjunctiva?
A
membrane
that protects the eye
What do tear glands produce and why?
Tears that keep the outer layer moist and contain salts, lubricants, and
antibodies
What is the function of the iris?
It controls the amount of light that enters the
eye
What happens to the pupil in response to light strength?
It dilates and opens up depending on the strength of the light
Where is the lens located in the eye?
Behind the
pupil
How do ciliary muscles affect the lens?
They
contract
to
stretch
the
lens
, making it
flatter
and
thinner
What is the role of the retina?
It contains light-sensitive cells called
rods
and
cones
What is the blind spot in the eye?
It is where the
optic nerve
exits the eye, with no rods or cones
How do ciliary muscles and suspensory ligaments work together?
Ciliary muscles
contract
to
stretch
the
lens
, while suspensory ligaments
hold
the
lens
in
place
What is the function of the sclera in the eye?
It
protects
the
eye.
What is the sclera commonly known as?
The
white of the eye
.
What role does the cornea play in the eye?
It
allows
light
to
enter
the
eye.
What is the function of the aqueous humour?
It keeps the eye in shape and nourishes it.
How does the lens function in the eye?
It
focuses
light
entering
the
eye.
What is the pupil's role in the eye?
It is the opening that lets light in.
How does the pupil respond to changes in light strength?
It dilates and opens up depending on light strength.
What is the function of the ciliary muscle?
It enables the
lens
to change shape for focusing.
What does the conjunctiva do?
It is a
membrane
that protects the eye.
What are the suspensory ligaments attached to?
They are attached to the
ciliary muscle
.
What does the retina contain?
It contains
light-sensitive
cells and nerve fibers.
What is the function of the choroid in the eye?
It provides oxygen and nourishment to the outer
retina
and absorbs excess light.
What is the fovea responsible for?
It is responsible for sharp
central
vision.
What is the optic nerve known for?
It is where nerve cells exit the eye, known as the
blind spot
.
What is the function of the vitreous humour?
It keeps the eye in shape and nourishes it.
What are the three main parts of the ear?
Outer ear
,
middle ear
, and
inner ear
What separates the outer ear from the middle ear?
The
tympanic membrane
(
eardrum
)
What is another name for the outer ear?
Auricle
or
pinna
What is the structure of the outer ear made of?
Ridged
cartilage
and skin
What is the function of the glands in the outer ear?
To secrete
earwax
What does the funnel-shaped canal in the outer ear lead to?
The
tympanic membrane
(
eardrum
)
What are the three tiny bones found in the middle ear?
Malleus
,
incus
, and
stapes
What is the role of the ossicles in the middle ear?
To transfer sound vibrations from the
eardrum
to the
inner ear
What do healthcare providers refer to the three tiny bones in the middle ear as?
The
ossicles
What is the function of the eustachian tubes in the middle ear?
To help equalize
air pressure
in the ears
What are the two main parts of the inner ear?
The
cochlea
and the
semicircular canals
What is the cochlea responsible for?
Hearing
What happens when sound enters the cochlea?
The fluid inside vibrates, causing tiny hairs to send
electrical
impulses to the brain
What are the semicircular canals also known as?
The
labyrinthine
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