The Ear
Eye Assorted
Inner Eye
Focus, Focus
Grab Bag
100
Collects sound waves and directs them into the ear.
The pinna
100
What stimulus do the eyes respond to?
Light
100
The innermost layer of the eyeball.
What is the retina?
100
the process that keeps the image in focus on the retina by adjusting the lens.
What is accommodation?
100
suspended from the ciliary body by suspensory ligaments,
can change shape in response to ciliary muscles
What is the lens?
200
What are the names of the three bones that make up the ossicles?
Malleus (hammer), incus (anvil) and stapes (stirrup).
200
The blind spot lacks _______.
Rods and cones.
200
The name of the indentation at the center of the retina.
Fovea (yellow spot)
200
Condition of the eye where the curvature of the cornea and lens is not uniform.
Astigmatism
200
Describe what happens in the eye in bright light.
In bright light the circular muscles contract; radial muscles relax.
The pupil becomes smaller allowing less light to enter the eye.
300
Function of the eustachian tube is
To keep the pressure on both sides of the ear drum constant.
300
The ________lies primarily under the sclera.
The choroid
300
Part of the eye responsible for most of the refraction
Cornea
300
the bending of light as it passes from one object into the next of different densities
What is refraction?
300
found in the large posterior cavity, helps to maintain the integrity of the eyeball.
What is vitreous humor?
400
What is the significance of having two ears?
Determine the direction and distance of sound.
400
Absorbs light and provides nutrition to the sclera
The choroid
400
Eye defect that is corrected with convex lens.
Hyperopia
400
adjusts the shape of the lens
What is the ciliary body?
400
What is the major difference between rods and cones?
Rods allows one to see in black and white only and function in dim light. Cones are sensitive to color and function in bright light.
500
What are the names of the parts labelled 1-4?
1. Pinna
2. Ear canal
3. Ear Drum
4. Ossicles
500
Transparent part that covers the sclera.
Conjuctiva
500
Describe the term "cataract".
Lens becomes opaque that may cause loss of vision as opaqueness increases.
500
Condition when the eyeball is too long from front to back, causing images to focus in front of the retina.
What is hyperopia?
500
What role do tears play in the eye?
Keep the front of the eyeball moist
Keep the surface of the eye clean.
Prevents infections.