Chapter 17 Special Senses Flashcards
chemical component of tears that is a natural antibiotic
lyoszyme
nerve that innervates the lacrimal gland
facial
epithelium that makes up the conjunctiva
stratified squamous
extrinsic eye muscle innervated by the trochlear nerve
superior oblique muscle
extrinsic eye muscle innervated by the abducens nerve
lateral rectus
cranial nerve that innervates the inferior rectus muscle
oculomotor
the intrinsic eye muscle that controls the shape of the lens
ciliary
the intrinsic eye muscle that changes pupil size and is innervated by the oculomotor nerve
constrictor pupillae
parts of the fibrous tunic of the eye
cornea, sclera
part of the vascular tunic of the eye that contains the dilator and constrictor pupillae muscles
iris
part of the vascular tunic of the eye that controls the shape of the lens
ciliary body (muscle)
the choroid is part of this tunic of the eye
vascular
type of tissue that makes up the sclera
dense fibrous
layer of the eyeball that contains melanin and blood vessels for nourishment of the retina
choroid
two components of the ciliary body
ciliary muscle, ciliary process
the part of the eye that makes aqueous humor
ciliary process
the term that describes the ability of the lens to change its shape
accomodation
what happens to the lens when the ciliary muscle relaxes
bulge
two parts of the eye that have no blood vessels
cornea & lens
part of the eye that contains aqueous humor
anterior cavity
the anterior and posterior chambers of the eye are divisions of this major cavity in the eye
anterior
part of the eye that contains vitreous humor
posterior cavity
nerve that innervates the ciliary muscle
oculomotor nerve
photoreceptors responsible for dim light vision
rods
photoreceptors responsible for visual acuity
cones
photoreceptors responsible for color
cones
layer of retinal cells closest to the choroid
pigmented epithelium
layer of retinal cells located closest to the vitreous humor
ganglion cells
the part of the retina that contains only cones
fovea centralis
part of the retina that has no rods or cones
optic disc (blind spot)
aqueous humor is drained into this structure
canal of Schlemm
bending of light from one medium to another
refraction
the first structure of the eye that light must pass through on its way to the retina
cornea
shape of the lens for far vision
flat
shape of the lens for near vision
round
old age vision (inability of lens to change its shape)
presbyopia
condition in which the eyeball is too long
myopia
an increase in aqueous humor can lead to a build up of pressure in the anterior cavity and a condition called
glaucoma
near-sightedness
myopia
this condition results in the picture focusing behind the retina
hyperopia
irregular curvature of the cornea
astigmatism
clouding of the lens
cataract
the chemical responsible for changing its shape in response to light in rods and cones comes from this vitamin
A
fibers that cross over in the optic chiasma come from this part of the retina
medial
medial retina fibers are used for this type of vision
peripheral
place in the brain where the visual cortex is found
occipital lobe
unique type of tissue found in an auricle
elastic cartilage
bone that houses the middle ear
temporal
structure that separates the external from the middle ear
tympanic membrane
bone attached to the tympanic membrane
malleus
bone that vibrates against the oval window
stapes
tube that connects the antrum to the nasopharynx
Eustachian (auditory)
space of the middle ear that houses the three ossicles
antrum
part of the middle ear responsible for equalizing air pressure on the two sides of the tympanic membrane
Eustachian (auditory) tube
hearing receptors found in the cochlear duct
organ of Corti
the major part of the internal ear involved in hearing
cochlea
end of the fluid chamber (scala tympani) that stops the wave of fluid flowing through the cochlea
round window
nerve that carries hearing impulses to the brain
VIII, vestibulocochlear
type of deafness due to ossification of joints between ossicles
conduction
type of deafness due to damage to the organ of Corti
sensorineural
type of deafness due to damage to the temporal lobe of the brain
sensorineural
hair cells in the internal ear send action potentials when the cell is deformed making these cells what types of receptors
mechanoreceptors
part of the internal ear responsible for rotational movement of the head
semicircular canals
part of the internal ear responsible for detecting head position
vestibule
the receptor cells of the utricle and saccule are found in which part of the internal ear
vestibule
olfactory nerves have to pierce this bone to reach the brain
ethmoid
olfactory receptors respond to different chemicals and are classified as this basic type of receptor
chemoreceptors
a special sense that adapts rapidly
olfaction
nerve that carries impulses from taste buds on the anterior 2/3 of the tongue
facial
nerve that carries impulses from taste buds at the back of the tongue
glossopharyngeal
nerve that carries impulses from taste buds on the epiglottis
vagus