click below
click below
Normal Size Small Size show me how
link11
the senses
| Question | Answer |
|---|---|
| 5 special senses | vision,hearing,equilibrum,smell,taste |
| 5 general senses | preasure,temperature,pain,touch,position |
| thin membrane that lines the inner surface of eyelid and covers the white of eye | conjunctiva |
| where are tears produced | lacrimal glands |
| function of the nasolacrimal duct | drains tears into ducts near the nasal corner of eye |
| middle,pigmented tunic of the eyeball | choroid |
| which tunic contains the photoreceptors | retina |
| refraction | bending of light rays as they pass from one substance to another of diffrent density |
| transparent portion of the sclera | cornea |
| 4 parts of the eye that participate in refraction | cornea,aqueous humor,lens,vitreous body |
| aqueous humor | watery fluid that fill most of the eyeball anterior to the lensand helps maintain the slight foward curve of the cornea |
| vitreous body | soft jelly like substance that fills entire space posterer to the lens,maintains shape of eyeball and aids in refraction |
| 2 receptors cell of the eye | rods and cones |
| what kind of light rods function in | dim light |
| fovea centralis | tiny depressed area near optic nerve,point of sharpest vision |
| color blindness results from a lack of what | retinal cones |
| what is the rod pigment | rhodopsin |
| night blindness results from a deficiency of what vitamin | vit A |
| visual impuses travel through the optic nearve to which part of the brain | visual center in the occipital cortex of the brain |
| function of the iris | colored or pigmented part of the eye composed of two sets of muscle fibers, governs the size of the central opening |
| is iris extrinsic or intrinsic | intrinsic |
| name of the extrinsic eye muscle that circles the bottom of the eyeball | inferior oblique |
| prebyopia | loss of visual accommodation that occurs w age,leading to farsightedness |
| 2 sensory nerves that supply the eye | optic nerve,ophthalmic branch of the trigeminal nerve |
| optic nerve | carried visual impulses from the retinal rods and cone to the brain |
| ophthalmic branch of trigeminal nerve | carried impulses of pain,touch,and temp from the eye and surrounding parts of the brain |
| optic disk | blind spot |
| nerve that supplies almost all extrinsic eye muscles | oculomotor nerve |
| hyperopia | farsightedness,abnormally short eyeball |
| astigmatism | caused by irregularity in the curvature of the cornea or the lens |
| scientific term for pinkeye | acute conjunctivitis |
| what is the opacity of the lens called | cataract |
| glaucoma | condition characterized by excess pearsure of the aqueous humor |
| visible external portion of the ear | pinna(auricle) |
| where is wax pruduced | external auditory canal |
| common name for tympanic membrane | eardrum |
| 2 parts of the ear that the tympanic membrane seperate | external auditoy canal,middle ear cavity |
| name for the 3 small bones in the middle ear | ossicles |
| which of the occicles come in contact with the tympanic membrane | malleus |
| what does the eustachian tube connect | middle ear cavity and throat/pharynx |
| what kind of vestibule contain | equilibrium |
| coiled division of the inner ear that contains the receptors for hearing | cochlea |
| organ for hearing | organ of corti |
| what form of equilibrium do maculae function in | stapes |
| what are cristae | receptor for dynamic equilibrium |
| what kind of movement do semicircular canals detect | body is spinning or moving in diffrent directions |
| otitis media | infection and inflamation of inner ear cavity |
| common name for otitis externa | swimmers ear |
| otosclerosis | a heredity bone disorder that prevents normal vibration of the stapes |
| which part of the tounge are sweet taste most acutely experienced | tip of the tounge |
| the interpretation of smell is closely related to what other sence | sense of taiste |
| proprioceptors | sensory receptor that aids in judging body position and changes in position,located in muscles, joints and tendons |
| where are the receptors for pain | free nerve endings |
| analgesics | a drug that relieves pain |
| endorphins | released naturally from certain regions of the brain and are associated with the control of pain |
| sensory adaption | gradual loss of sensation when sensory receptors are exposed to continuous stimulation |
| structers that protect the eye | skull bones of the eye orbit,upper and lower eyelids |
| rods | dim light |
| cones | bright light, sharp image |
| 3 divisions of the ear | outer,middle,inner |
| presbycusis | slowly progressive loss that often accompanies aging |
| taiste | tounge |
| smell | epithelium of the superior region of the nasal cavity |
| strabismus | divation of the eye that resuls from lack of coordination of the eyeball muscles |
| cones are located | in the back of the eye |
| 3 colors absorbed by cones | red,green,blue |
| how do we see colors like orange and purple | range of color, each type of cone overlaps |
| what happens in the cone of colorblind people | some cones can simply not see color |
| 2 organs that are the bodys organ detectors | eyes,ears |
| 3 organs of balance or equilibrium | semicircular canals,utricle,saccule |
| enucleation | removal of eyeball |
| ophthalmia neonatorum | acute infection of a new born |
| trachoma | acute eye infection caused by clamdia |
| retinal detachment | retina seperates from underlying layer of th eye |
| strabismus | deviation of the eye resulting in lack eye eyeball muscle coordiantion |