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30 Cards in this Set

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The pigmented portion of the eye which we can see through the transparent corneal surface, contains blood vessels, pigment cells, and two layers of smooth muscle fibers.
The Iris
area where a visual image arrives after it passes through the cornea and lens. Contains no rods.
Macula lutea
The highest concentration of cones occurs at the center of the macula lutea. It is the site of sharpest vision.
Fovea or Fovea centralis
The ___ ____ has no photoreceptors or other structures that are typical of the rest of the retina
optic disc
Because light striking this area goes unnoticed, the optic disc is commonly called the ___ ____.
blind spot
Aqueous humor returns to the circulation from the ___ ____.
anterior chamber
After filtering through a network of connective tissues located near the base of the iris, aqueous humor enters the ___ of ___ or the ______ ______ ______.
canal of Schlemm

scleral venous sinus.
The _____ Muscle as well as the _____ Ligaments controls the shape of the lens.
Ciliary

Suspensory
The discs of the outer segment in both rods and cones contain these special organic compounds
Visual Pigments
Visual pigments are derivatives of the compound ____ , the visual pigment found in rods
Rhodopsin
Rhodopsin consists of a protein,___, bound to the pigment ___, or retinene, which is synthesized from vitamin __.
opsin
retinal
A
When all three types of cones are stimulated, or when rods alone are stimulated, you see a ____ light
"white"
The three types of cones are:
blue cones , green cones , and red cones
The External Ear includes the fleshy and cartilaginous auricle , or ___ , which surrounds the __ __ __ , or ear canal .
pinna

external acoustic canal
a passageway that ends at the tympanic membrane,

also called the __ or __
The external acoustic canal

tympanum or eardrum
Glands along the external acoustic canal. It secretes a waxy material that helps deny access to foreign objects
Ceruminous glands
Waxy secretion of the ceruminous glands that also reduces the chances of infection.
Cerumen
Vibration of the tympanic membrane converts arriving sound waves into ___ ___.
mechanical movements
The senses of ____&___are provided by the receptors of the inner ear.
equilibrium and hearing
The Basic sensory receptors of the inner ear.
Hair cells
The anterior , posterior , and lateral semicircular ducts are continuous with the ____.
utricle
Each semicircular duct contains an _____:
An expanded region that contains the hair cells
Ampulla
The hair cells of the cochlear duct are located in a structure called the ____ of ____ .
organ of Corti
A membrane that separates the cochlear duct from the tympanic duct.
the basilar membrane
1) Sound Waves Arrive at the ____ _____
Tympanic Membrane
2) Movement of the Tympanic Membrane Causes Displacement of the ___ ___
Auditory Ossicles
3) Movement of the Stapes at the Oval Window Establishes Pressure Waves in the __ of the ____ ____
Perilymph

Vestibular Duct
4) The Pressure Waves Distort the ___ ___On Their Way to the Round Window of the _____ ____.
Basilar Membrane

Tympanic Duct
5) Vibration of the Basilar Membrane Causes Vibration of Hair Cells Against the ____ _____.
Tectorial Membrane
6) Information About the Region and Intensity of Stimulation Is Relayed to the CNS Over the ___ Branch of the ___ Nerve (VIII).
Cochlear

Vestibulocochlear