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senses
| Term | Definition |
|---|---|
| general senses | everyday, all over body-single senses (through spinal cord and thalmus) |
| special senses | eyes, ears, nose, tounge |
| sensory receptor types | encapsulated- covered and protected unencapsulated- uncovered and pain |
| photoreceptors | light-vision |
| chemoreceptors | chemicals-tatse and smell |
| pain receptors | injury-warning system |
| thermoreceptors | temp. change |
| mechanorecptors | move and pressure-viberation |
| proprioceptors | body position |
| all sense organs have common functional characteristics- | all are able to detect stimulus-heat a stimulus is converted into a nerve inpulse- transduction-thermal receptor a nerve impulse is percieved as a sensation in the CNS- hot, pain |
| free nerve endings | pain, temp., crude touch |
| tactile corpuscles | fine touch-vibraton |
| bulbous corpuscles | touch-pressure-strech |
| lamellar corpuscles | pressure-vibration |
| bulboid corpuscles | touch, light touch |
| golgi tendon receptors | tendons- prevent injury |
| muscle spindles | stretch, balance |
| special senses - struture of eye and function | sclera- white of eye- protection |
| cornea | window of eye-recieves light |
| conjunctiva | thin moist lining of lid |
| choriod | iris and pupil function |
| lens | focuses |
| retina | detects light-innermost layer- contains rods for night vision and cones for day vision |
| Glycoma- | damages optic nerve |
| visual pathway | light-retina-nerve-brain |
| fluids of eyeball- | aqueous humor- front of lens viterious humor-back of lens-jelly like |
| blind spot | no receptors |
| caterax | light can't reach |
| hearing | sound waves |
| equilibruim | position changes - inner ear |
| balance | respond to movement or vibration |
| structure of external ear | auricle (pinna) -part u can see external auditory canal- tube leading to ear curving canal-2.5 cm 1 inch in length contains ceruminous glands ends ar tympatic membrane-ear drum- where sound hits first |
| fluid outside | perilymph |
| fluid inside | endolymph |
| fluid moves when | hair cells bend |
| fluid movement = | sound |
| cerumin | ear wax |
| static | sense of gravity |
| dynamic | sense of speed and direction of movement |
| cemorececptors are | tatse buds |
| 2 cranial nerves | 7 and 9 carry gustatory (tatse) impulses |
| four kinds of tatse sensations | sweet, sour, bitter, and salty |
| olfactory | smelll |
| both _________ and _______ work together to permit any creations of other tatses | gustatory and olfactory |
| smell occurs in | olfactory muscoa |
| sensations are all percieved in _____ | the brain |
| loss of smell = | decrease in appetite |
Created by:
gabbyc420