This site is 100% ad supported. Please add an exception to adblock for this site.

Anatomy - Nervous: Sensory (mostly the eye)

This set focuses on the eye and skin receptors. It is taken from the Martini and Bartholomew book, bear with it please.

Terms

undefined, object
copy deck
proprioception
sense of muscle/body position
nociceptor
pain receptor
fast pain
specific pain like prickling or a cut
slow pain
indefinite pain like general burning and aching
referred pain
perception of pain not coming from its true origin
ion channels
mechanoreceptors use these to sense distortions
baroreceptor
general pressure receptor
root hair plexus
senses hair motion
Merkel's disc
fine touch and pressure receptor connected to large sensory cells
Merkel's cell
large cell giving sensation of touch to a corresponding receptor
Meissner's corpuscle
fine touch/pressure receptor independent of a sensory cell. found in eyelids, lips and fingertips
Pacinian corpuscles
large pulsing and pressure receptors
Ruffini corpuscle
pressure and distortion receptor found deep in the skin
baroreceptor
free nerve endings monitoring pressure in an elastic organ
carotid sinus, aortic sinus
major baroreceptors are here
muscle spindle
receptor sensing the position of a muscle via its length
carotid bodies, aortic bodies
measure oxygen concentration in blood
prevent the buildup of stimuli
function of olfactory mucus
primary taste sensations
sweet, salt, sour and bitter
circumvallate papillae
protect taste buds
sweet
sensation at the tip of the tongue
bitter
sensation farthest back in the tongue
microvilli
cilia of taste receptors
palpebra
another name for eyelid
lacrimal gland
produces tears
canthus
place of eyelid attachment
lacrimal caruncle
produces gritty deposits over the eye
sty
eye swelling b/c of a bacterial infection
conjunctiva
outer covering of the eye
cornea
the transparent part of the eyeball
conjunctivitis
irritation of corneal surface
slightly basic
the pH of tears is
lysozyme
the antibacterial part of tears
nasolacrimal duct
connects the eye and the nasal cavity
2.5 cm
diameter of an eye
8 g
mass of an eye
vitreous body
the large cavity in the back of the eye
aqueous humor
gelatinous filling of the anterior cavity of the eye
fibrous tunic
layer of collagen and extrinsic eye muscles
sclera
the white of the eye
cornea
fibrous layer covering the lens
vascular tunic
layer of intrinsic eye muscles and blood vessels
iris
contains outer pigment cells and muscles
iris
regulates the amount of light passing into the eye
pupil
the opening for light in the eye
ciliary processes of the ciliary body
the lens attaches here
suspensory ligament
attaches the lens to muscles
choroid
supplies retina with oxygen and nutrients
rods
photoreceptors that allow for dark vision
cones
photoreceptors that allow for color vision
125 million
# of rods
6 million
# of cones
macula lutes
spot on the retina where there is no rods
fovea centralis
area of highest cones concentration on the retina
bipolar cells
they synapse with photoreceptors
horizontal and amacrine cells
nerve cells that adapt to light and dark fluctuations
optic disc
the optic nerve starts here
blind spot
another name for the optic disc
canal of Schlemm
recirculates aqueous humor into veins
glaucoma
condition of elevated pressure in the eye
cataract
deformation of the lens because of an injury, drugs or else
contract
to focus a close-up object, ciliatory musles _____
relax
to focus a distant object, the ciliatory muscles _____
emmetropia
condition of normal vision
myopia
nearsightedness, blurring of distant images
hyperopia
farsightedness, blurring of close images
astigmatism
blurred vision in general
rhodopsin
the "parent" visual protein
opsin and retinal
two parts of rhodopsin
vitamin A
source for retinal
bleaching
the reason for "ghost" images
night blindness
first symptom of vitamin A shortage
presbyopia
aging farsightedness due to lack of lens elasticity
9 cm
near point of vision in young people
macular degeneration
loss of eyesight due to leakage of blood and loss of photoreceptors
senile cataract
cataract caused by aging

Deck Info

76

permalink