anatomy senses

sensation

brain becomes aware of pain

pereception

interprets sensation

projection

where the pain is coming from

chemoreceptors

bind to specifc chemicals (smell, taste, oxygen)

pain receptors

tissue damage (mechano, electrical, thermal)

mechanoreceptors

mechanical forces (touch, tension, blood pressure)

sensory adaptation

ability to ignore unimportant stimuli, best acomplished by thermoreceptors and smell

freezing sensation

below 10 degrees celsius or 50 degrees fahrenheit

burning sensation

above 45 degrees celsius or above 113 fahrenheit

visceral pain

feel as if it is coming from another part of the body

pinnea

collects sound waves into the ear

external acoustic meatus

carries sound to tympanic membrane

tympanic membrane

vibrates in response to sound waves

malleus

transfers vibrations to incus

incus

transfers vibration to stapes

stapes

transfers vibrations by impacting thr oval window

estuchian tube

equalizes pressure between middle ear and external environment

semicircular canals

dynamic equilbirum movement of head

lens

refracts light to focus it on the back of the eye

iris

muscle that controls the amount of light that enters the eye

vitreous humor

maintains shape of the eye

cornea

allows light to enter, slightly refracts

optic nerve

transmit nerve impulses to the brain

choroid coat

contains pigment that absorbs extra light and blood supply

sclera

tough protective outer layer

cililary body

controls the shape of the lens

retina

contains photoreceptors

fovea centrails

location of sharpest vision

pupil

allows light to enter eye

aqueous humor

provides nutrients to the cornea

spiral organ

hearing

crista ampullies

dynamic equilbrium

macula

static equilbrium

dynamic equilbrium

rotation of head, receptors in cristae ampullaries of semicircular canals

static equilbrium

position of head when, receptors in macula of vestibule

oval window

opening to inner ear, transfers vibrations into the inner ear, and stimulate hearing receptors

round window

allows excess vibrations that dissapate into the tympanic cavity

anterior chamber

space between cornea ans lens filled with aquaous humor

optic disc

blind spot

rods

absorb all visible wavelengths and see black and white

cones

only respond to a specific wavelength, red blue and green

what is the first part of the eye to come in contact with light

aqueous humor

choclea

changes vibrations into nerve impulses

stimulation of crista ampullaris

results in a feeling of motion