Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
CH 13 Sensory System
| Question | Answer |
|---|---|
| often exist as individual cells or receptor units;widely distributed throughout the body | general sense organs |
| large and complex organs; localized groupings of special receptors | Special sense organs |
| classification by presence or absence of covering capsule | encapsulated and unencapsulated (naked or free) |
| specialized area of a sensory neuron that detect a specific stimulus. | receptors |
| receptors that innervates light (for night vision) | rods |
| receptors that innervates color (for day vision) | cones |
| sensory receptors for light | photoreceptors |
| sensory receptors for chemicals | chemoreceptor |
| sensory receptors for injury | pain receptors |
| sensory receptors for temperature change | thermoreceptors |
| sensory receptors for movement or deforming of capsule | mechanoreceptor |
| sensory receptors for position of body parts or changes in muscle length or tension | propioreceptor |
| sensory receptors for pain | noriceptors |
| converting a stimulus into a sensation: all sense organs have common functional characteristics | 1) they are all able to detect a particular stimulus. 2) stimulus is converted into nerve impulse. 3) nerve impulse is perceived as a sensation in the CNS |
| general sense organ for pain and crude touch | free nerve endings |
| general sense organ for fine touch and vibration | meissner's corpulscles |
| general sense organ for touch and pressure | ruffinis |
| general sense organ for pressure and vibration | pacinian |
| general sense organ for touch | krause's |
| general sense organ for proprioception | Gogli |
| general sense organ for proprioception | muscle |
| tough outer coat; "white" of eye; cornea is transparent part of sclera over iris | scelera |
| pigmented vascular layer prevents scattering of light; front part of this layer made of ciliary muscle and iris; it provides retina with a rich supply of blood | choroid |
| the colored part of the eye; contains the intrinsic eye muscle and the circular and radial muscle | iris |
| the hole in the center of the iris | pupil |
| changes the shape of the eye | ciliary muscle |
| innermost layer of the eye; contains rods and cones | retina |
| covering the front surface of the sclera and lining the eyelid | conjunctive (outside) |
| transparent body behind the pupil; focuses light rays on the retina | lens |
| considered the blind spot | optic disc |
| part of eye with highest concentration of cones. | fovea centralis |
| may damage retina and cause blindness | increase in interocular pressure |
| in the anterior cavity in front of the lens | acqueous humor (eye fluids) |
| in the posterior cavity behind the lens | vitreous humor (eye fluids) |
| tears contains an enzyme called | lysozyme |
| secrete the tears | lacrimal gland |
| maintains the shape of the eyeball | vitreous humor (eye fluids) |
| drains the acqueous humor | Canal of Schlemm |
| attached to lens that cause change of shape | suspensory ligament |
| unequal tension excerted by the extrinsic muscle | strabismus |
| innermost layer of retina contains | rods and cones |
| impulse travels from the rods and cones through the | bipolar and ganglionic layers of retina |
| Nerve impulse leaves the eye through | the optic nerve |
| the point of exit is ree of receptors and is therefore called | the blind spot |
| Visual interpretation occurs in the | visual cortex |
| (nearsightedness) is often caused by elongation of the eyeball | myopia |
| (farsightedness) is often caused by a shortend eyeball | hyperopia |
| is distortion caused by an irregularity of the cornea or lens | astigmatism |
| can interfere with refraction | Conjunctivitis |
| chronic chlamydial infection | trachoma |
| highly contagious infection that produces a discharge of mucous pus | acute bacterial conjuncvitis |
| improper alignment of eyes | strabismus |
| can be complication of aging, eye tumors or head trauma | retinal detachment |
| damage to retina from hemorrhages and growth of abnormal vessels associated with diabetis mellitus | diabetic retinopathy |
| intraocular pressure that decreases blood flow in retina and thus causes retinal degeneration | glaucoma |
| night blindness or inability to see in dim light is caused by retinal degeneration or lack of vit a | nyctalopia |
| refers to clouding of the lens | cataracts |
| caused by impaired drainage of acqueous humor through the canal of Schlemm and causes increase IOP | glaucoma |
| often referred to as a choked disc | glaucoma |
| progressive degeneration of central part of retina; leading cause of permanent blindness in elderly | macular degeneration |
| X-linked genetic condition in which certain colors are not seen properly; it is caused by an abnormality in the cones photopigments | red-green color blindness |
| resulting from diabetes, glaucoma, and other causes can impair vision | Degeneration of the optic nerve |
| is the loss of only the central visual field when only certain nerve pathways are damaged | scotoma |
| can damage visual processing centers; example is acquired cortical color blindness | cerebrovascular accidents (CVA) |
| functions in hearing and in equilibrium and balance | ear |
| receptors for hearing and equilibrium | mechanoreceptor |
| divisions of ear | external; middle and inner ear |
| parts of external ear | auricle (pinna); external auditory canal; bone |
| parts of middle ear (ear ossicles or tiny bones) | malleus; incus and stapes |
| separates the external ear from the middle ear | tympanic membrane or eardrum |
| this auditory tube connects the middle ear to the throat or pharyx | eustacian tube |
| inflammation of eustacian tube | otitis media |
| parts of inner ear | vestibule, semicircular canals and cochlea |
| specialized hair cells on this organ responds when bent by the movement of surrounding endolymph set in motion by sound waves | organ of corti |
| The receptors for balance in the semicircular canals are called | cristae ampullaris |
| concerned with balance. | semicircular canals |
| wax | cerumen |
| most related to sense of hearing | organ of corti |
| inherited bone disorder involving irregularity of the stapes; it first appears as tinnitus (ringing) then progresses or hearing loss | otosclerosis |
| ear inflammation caused by infection; can produce sweeling and fluids that block sound conduction | otitis |
| progressive nerve deafness associated with aging | Presbycusis |
| Progressive nerve deafness can also result from | chronic exposure to loud noise |
| chronic inner ear disorder characterized by tinnitus, nerve deafness, and vertigo | Meniere's disease |
| receptors are chemoreceptors | taste buds |
| cranial nerves VII and IX carry gustatory impulses | taste receptors |
| 4 kinds of taste sensations | sweet, sour, bitter and salty |
Created by:
jekjes
Popular Nursing sets