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Chapter 15
SI anatomy 1
39
Anatomy
Undergraduate 1
04/19/2017

Additional Anatomy Flashcards

 


 

Cards

Term
What prevents the eye from drying out?
Definition
Conjunctiva
Term
What drains lacrimal secretions or tears?
Definition
lacrimal gland
Term
What contains mucus, antibodies, antibacterial lysozyme, and cleanses/ protects the eye?
Definition
Lacrimal secretions (tears)
Term
List what the extrinsic eye muscles allow the eye to do.
Definition

-follow moving objects

-maintain shape of eyeball

-hold it in orbit

Term
T or F: The extrinsic eye muscles are among most precisely and rapidly controlled skeletal muscles.
Definition
True
Term
What does the fibrous layer of the eye contain?
Definition
Sclera, cornea
Term
What part of the eye is white and opaque and anchors extrinsic eye muscles?
Definition
sclera
Term
What part of the eye can be transplanted with no fear of rejection? Why?
Definition
Cornea; because it has no blood vessels. So the immune system can't get to it.
Term
What is the most exposed part of the eye?
Definition
Cornea
Term
What is another name for the vascular layer?
Definition
Uvea
Term
What does the choroid do?
Definition

provides nutrition to all layers

helps absorb light

Term
What controls the shape of the lens?
Definition
Ciliary body
Term
What part of the eye lies between the cornea and the lens?
Definition
iris
Term
What allows light to enter the eye?
Definition
pupil
Term
What type of cells store vitamin A and acts as phagocytes to remove dead/ damaged cells?
Definition
Pigment cells
Term
What layer of retina plays a direct role in vision?
Definition
Neural layer
Term
What part of the neural layer contains only cones?
Definition
Fovea centralis
Term
What is the yellow area near the center of the retina?
Definition
Macula Lutae
Term
What are dim light receptors that provide no color vision?
Definition
Rods
Term
T or F:Cones are more numerous than rods.
Definition
False, rods are more numerous
Term
What provide color vision and function in bright light?
Definition
cones
Term
What form the optic nerve?
Definition
ganglion cell axons
Term
What causes the blind spot?
Definition
Optic nerve exiting through the optic disc
Term
T or F: The lens can change shape.
Definition
True
Term
What part of the eye is transparent and avascular?
Definition
Lens
Term
T or F: the lens is vascular
Definition
False; avascular
Term
What forms the bulk of the lens?
Definition
Lens fibers
Term
Does the lens become more or less elastic throughout your lifetime?
Definition
Less
Term
What lens converges light?
Definition
Convex
Term
What lens disperses light?
Definition
concave
Term
When is light bent?
Definition

When it passes from one medium to another

 

When it strikes a curved surface

Term
In what order does light pass through the eye?
Definition
Cornea, aqueous humor, lens, vitreous humor, entire neural layer of the retina, photoreceptors
Term
How many times is light bent? and where
Definition
3, entering cornea, entering lens, leaving cornea
Term
Define myopia.
Definition
Nearsightedness, distant objects focused in front of the retina
Term
Define hyperopia.
Definition
farsightedness, light rays focus behind the retina
Term
What is the function of the auricle?
Definition
Funnels sound waves into the external auditory canal
Term
What is the function of the external acoustic meatus?
Definition
Lined with sebaceous glands and ceruminous glands.
Term
What are the 3 ossicles?
Definition
malleus, incus, stapes
Term
What is another name for the internal ear?
Definition
Labyrinth
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