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