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Definition
found superficially, in hairy and hairless skin
function: light touch, temp, and pain |
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dentrite wrapped around a hair follicle
function: light touch when hair is displaces |
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in the dermal papillae on hairless skin
function: light touch and low freq vibration |
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Definition
found in stratum basale of hairy and hairless skin
pressure touch |
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| lamellated or pacinian corpuscles |
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Definition
in dermis, joint capsules, some viscera, genitals, and breasts
function: high freq vibration, pressure, stretch and tickling |
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Definition
in dermis and join capsule
function: pressure touch |
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Definition
(gustation)
form the capsule surrounding the taste receptor cells
support and protect receptor cells |
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Definition
50 of these in each taste bud
has microvilli=taste hair. this protrudes from apical surface
these are the receptor surface for taste stimuli |
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Definition
found peripherally on base of taste bud
develop into supporting cells and then receptor cells (10 day life) |
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Definition
small, spike like projections found on tongue. most abundant, but lack papillae
gives tongue its roughness and aids in food manipulation |
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| form parallel bands on sides of posterior 2/3 of tongue. few taste buds |
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| mushroom shaped projections concentrated on tip and sides (5 taste buds) |
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Definition
large circular papillae with depression in middle
12 arranged in v shape on back of tongue
(100-300 taste buds) |
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Definition
| two olfactory organs in nasal cavity |
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Term
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Definition
| connective tissue beneath the olfactory epithelium |
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Definition
(olfactory)
columnar epithelial cells found in olfactory epithelium between olfactory receptor cells |
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Definition
bipolar neurons in epithelium.
dendrite is enlarged on the surface of epithelium. called "olfactory vesicle" this has cilia that project into mucus.
odor causes depolarization on these hairs. |
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Term
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Definition
| cells taht replace damaged receptor cells at base of olfactory epithelium |
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Definition
| mucus glands found in lamina propria that moisten epithelium and dissolves odor molecules |
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Definition
fleshy external ear flap on the side of the head.
collects sound waves and directs them to the inside ear |
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Definition
| passageway that directs sound waves from auricle to tympanic membrane |
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Definition
eardrum
separates the outer and middle ears. mechanically transfers sound waves to middle ear |
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Term
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Definition
secretes ear wax
located at base of hairs that line canal
prevents things from getting to the eardrum |
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Term
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Definition
| ear bone that is attached to the inside of the tympanic membrane. articulates with the incus and transmits vibrations |
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Definition
| ear bone that articulates with malleus and stapes and transmits vibrations |
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Definition
| ear bone that transmits vibrations from incus to oval window |
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Term
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Definition
opening between middle and inner ear.
22 times smaller than tympanic membrane which magnifies the vibrations |
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Definition
| opening directly below oval window. covered by secondary tympanic membrane. bulges into middle ear to dissipate the pressure waves within cochlea after detection by inner ear |
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Definition
| tube that connects middle ear and nasopharynx. equalizes air pressure in middle ear |
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Definition
| small skeletal muscle that protects the oval window by dampening vibration of stapes |
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Definition
| muscle that limits the movement bones and increases tension of tympanic membrane to prevent damage to it during long prolonged noise. |
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Definition
| series of interconnected passageways in temporal bone |
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Definition
| interconnected fluid filled tubes found within bony labyrinth |
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Term
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Definition
part of bony labyrinth resembling snail shell
contains cochlear duct |
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Definition
| part of membranous labyrinth found within cochlea. contains hearing receptor cells |
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Definition
| part of bony labyrinth containing the saccule and utricle |
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Definition
| pair of membranous sacs inside the vestibule that has receptor cells for gravity and linear acceleration |
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Term
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Definition
| part of bony labyrinth that contains the semicircular ducts |
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Term
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Definition
three fluid filled ducts inside semicircular canals
oriented at right angles to each other
info on position, acceleration, etc |
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Definition
composed of lacrimal gland and lacrimal ducts
moistens eye and washes away foreign substances |
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Definition
| epithelial covering on inside of eyelid and anterior surface of eye |
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Definition
superior-rotates eye down and medially
inferior-rotates eye up and medially |
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Term
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Definition
four muscles (superior, inferior, medial, and lateral)
move eye up, down, laterally, medially |
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Term
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Definition
white of the eye
tough tendon like layer continuous with dura mater of the brain around optic nerve.
insertion point of six eye muscles |
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Term
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Definition
most anterior layer of eye that is continuous with sclera
transparent for allowing light into eye
well supplied with nerves. lacks blood vessels |
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Definition
searates fibrous and sensory tunics
contains capillaries and melanocytes |
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Term
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Definition
beneath cornea. gives us eye color
composed of two layers of pupillary muscles that control diameter |
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Definition
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Definition
thick ring of tissue attached to and just beneath the iris.
anchored at margins by choroid.
holds lens in place. contains ciliary muscle that changes the lens shape to focus light |
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Term
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Definition
beneath iris and held in the center of the pupil by suspending ligaments extending from ciliary body
focuses light on retina |
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Term
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Definition
two innermost layers of eye. neural layer contains photoreceptors and neurons that react to light and transmit signals
beneath is pigmented layer that absorbs light that prevents visual echoes |
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Term
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Definition
| photoreceptor cells very sensitive to light. enable us to see shaves of gray in dim light |
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Term
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Definition
| photoreceptor cells responsible for color vision. 3 types (red, green, blue) |
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Definition
| synapse with dendrites of rods and cones. transmit nerve impulses to ganglion cells |
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Term
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Definition
| synapse with axons of bipolar neurons. combine and form the optic nerve |
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Definition
| where optic nerve leaves the eye. not covered by the eye. blind spot in the eye |
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| cranial nerve that transmits visual info to the brain. |
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