Week 8- special and general senses Flashcards
Sensory portion nervous system
Detects changes outside and inside of body
6 general senses
Temperature
pain
touch
pressure
vibration
position of body
5 special senses
smell
vision
hearing
equilibrium
taste
nociceptors
pain receptors
type a- fast pain(cut)
type c-slow pain(burn)
chemoreceptors
response to water soluble and lipid soluble substances dissolved in body fluids
thermoreceptors
temperature receptors
mechanoreceptors
sensitive to stimuli that distort plasma membrane
stretching,compressoin, twisting etc
propricoceprots
monitor positions of joints and muscles
baroreceptors
detects pressure changes in blood vessels and portions of digestive, reproductive and urinary tracts
tactile receptors
provide sensations of touch, pressure and vibration
location of sensory receptors for smell
olfactory organs located in nose
receptors located in nasal cavity, on nasal septum
Olfactory nerve
Sends smell information to brain
gustation
provides information about consumed food or liquids
location of sensory receptors for taste
surface of tongue within taste buds
main types of taste
sweet
salty
sour
savory
bitter
Where will the auditory tube drain fluid
nasophararyx
Tympanic membrane function
divides the middle and outer ear
How does hearing occur
-Sound waves vibrate tympanic membrane
-Tympanic membrane/ossicles amplify vibrations to oval window
– Vibrations cause movement of (fluid) in the cochlea
– Hairs will move in response to the movement of the fluid and stimulate the hearing receptors in the cochlea
– These receptors will change the information into an electrical signal and send the information to the brain via Cochlear portion of the Vestibulocochlear nerve
which areas of ear are involved in hearing
all 3 areas
specific location for receptors for hearing
Cochlear duct
where in brain is hearing being interpreted
Temporal lobe
which areas of ear are involved in equilibrium
semicircular canals
utricle
saccule
Palpebral fissure
space between eyelids
lacrimal caruncle
produces thick secretion during sleep
conjuctiva
Lines most of surface of eye and inner eyelids
function of lacrimal gland
produces tears
purpose of tears
reduces friction
removes debris
prevents bacterial infection
provide nutrients and oxygen to conjuctiva
where do tears drain
lacrimal sac and nasolacrimal duct
three layers of eye
Fibrous tunic
vascular tunic
neural tunic
iris function
regulates the amount of light entering the eye via smooth muscle
ciliary body function
secretes aqueous humor (fluid) and supports lens (alters shape of lens)
lens function
changes shape to help focus the light on the retina. It helps with accommodation as well (transitioning from near to far sight)
choroid layer function
highly vascular to provide blood supply to the eye
cornea function
admits light into the eye (first structure the light will go through)
optic disc function
the site where optic nerve exits eyeball (blind spot)
cones
active at high light level and detects color
rods
active at low light and can’t detect color
fovea centrialis function
Cone cells are concentrated here and it is the area of best vision
sclera function
dense, collagenous white of the eye—outer protective eye layer
Eye structures that light travels through to get to retina
cornea
iris
lense
retina
sensory recepotors for vision
rods and cones
where in brain is vision interpreted
occipital lobe
inferior oblique m
1
inferior rectus m
2
superior oblique m
3
superior rectus m
4
medial rectus m
5
lateral rectus m
6
lacrimal gland
7
lateral canthus
8
medial canthus
9
lacrimal carnucle
10
lacrimal sac
11
cornea
12
sclera
13
pupil
14
iris
15
ciliary body
16
choroid
17
retina
18
fovea centralis
19
optic disk
20
optic nerve
21
lens
22
auricle
23
external acoustic meatus
24
malleus
25
incus
26
stapes
27
auditory tube
28
tympanic membrane
29
round window
30
oval window
31
semicircular canals
32
vestibule
33
ampulla
34
cochlea
35
vesitboluchlear nerve
36
