Chapter 15 special senses (Set 2)
The function of the auditory tube is to transmit sound vibrations
FALSE
There are two varieties of cones; one responds to red light and the other responds to green light
FALSE; there are 3
__________ glands are located on the lateral end of each eye
Lacrimal
An astigmatism results from unequal curvatures of the cornea or lens.
TRUE
Deafness is defined as hearing loss ranging from slight to total loss.
TRUE
In close vision and bright light, the pupil will constrict
TRUE
In order to hear sound, vibrations pass from the eardrum to the ossicles, and on to the oval window.
TRUE
Rods enable vision in dim light
TRUE
The ciliary body is a smooth muscle structure to which the lens is attached
TRUE
The pupil is the circular opening in the iris through which light passes.
TRUE
The lens divides the eye into two segments, the __________ and the __________
anterior (aqueous); posterior (vitreous
Incus
anvil
The three sets of color receptors within the retina are sensitive to wavelengths of visible light that are
blue, green, and red
Blood-rich tunic that contains dark pigment
choroid
The middle coat of the eyeball that contains pigment which prevents light from scattering in the eyeball is the
choroid
Smooth muscle structures attached to the lens
ciliary body
The aqueous humor of the eye is reabsorbed into venous blood through the:
ciliary body
The three subdivisions of the bony labyrinth of the internal ear are __________, __________, and __________.
cochlea, vestibule, semicircular canals
Semicircular canals
contains receptors for dynamic equilibrium
Spiral organ of Corti
contains the hair cells
Vestibule
contains the receptors for static equilibrium
The transparent central anterior portion of the sclera through which light enters the eye is called the
cornea
Which one of the following correctly lists the order of the parts through which light passes as it enters the eye:
cornea, aqueous humor, lens, vitreous humor
Tympanic membrane
eardrum
Area of greatest visual acuity
fovea centralis
The area of sharpest visual acuity that normally contains only cones is the __________.
fovea centralis
The greatest visual acuity is found at the
fovea centralis
Increased pressure within the eye
glaucoma
The eye condition resulting from the inability of the aqueous humor to drain from the eye is called __________.
glaucoma
Hearing receptors within the spiral organ of Corti are called
hair cells
Malleus
hammer
Eyeball is "too short
hyperopia
The auditory ossicle called the "anvil" is also called the
incus
Equilibrium receptors are located in the
inner ear
Circularly and radially arranged pigmented smooth muscle fibers
iris
The pigmented portion of the eye that has a rounded opening through which light passes is the
iris
Which one of the following is NOT true of color blindness:
it occurs most often in women
The gland that produces tears in the eye is called the:
lacrimal gland
Flexible biconvex crystal-like structure
lens
What structure of the eye focuses light on the retina:
lens
Auditory tube
links the middle ear and the throat
The pathway of vibrations through the ossicles from the tympanic membrane, or eardrum, to the oval window is:
malleus, incus, stapes
An ear infection following an illness such as a cold has passed from the throat through the auditory tube to the
middle ear
Nearsightedness
myopia
The inability to see distant objects is termed "nearsighted" or
myopia
Prolonged vitamin A deficiency results in deterioration of the neural retina
night blindness
Fibers from the medial side of each eye cross over to the opposite side of the brain at the __________.
optic chiasma
Blind spot
optic disc
Which one of the following is NOT part of the inner ear?
ossicles
Pinna
outer ear
Rods and cones are called __________ because they respond to light
photoreceptors
Rounded opening through which light passes
pupil
Contains millions of photoreceptors
retina
Which layer of the eye contains rods and cones:
retina
"White of the eye"
sclera
The fibrous outermost tunic seen anteriorily as the "white of the eye" is the:
sclera
Aqueous humor is reabsorbed into venous blood at the sclera-cornea conjunction through the __________.
scleral venous sinus or canal of Schlemm
Dynamic equilibrium receptors are found in the:
semicircular canals
Cochlea
snail-like subdivision of the osseous labyrinth
Hair cells that function as hearing receptors are located within the
spiral organ of Corti
The stirrup bone of the internal ear is also known as __________.
stapes
Stapes
stirrup
The cochlear nerve transmits impulses to the auditory cortex located in the _____
temporal lobe
Sound waves entering the external auditory canal hit the eardrum, also known as the:
tympanic membrane
A division of the cranial nerve, the __________ transmits information to the cerebellum about equilibrium
vestibular nerve
The portion of the bony labyrinth responsible for static equilibrium is the:
vestibule
The gel-like substance that reinforces the eyeball and prevents it from collapsing inward is the
vitreous humor