senses
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| List the five special senses. | 1.vision 2. hearing 3. equilibrium 4. taste 5. smell
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| list five general senses. | 1.pressure 2.temperature 3.pain 4.touch 5.postion
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| What is the thin membrane that lines the inner surface of the eyelids and covers the visible portion of the white of the eye? | Conjunctiva
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| where are tears produced? | lacrimal glands
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| what is the function of the nasolacrimal duct? | allow tears into the nose causing a runny nose.
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| what is the middle, pigmented tunic of the eyeball? | Choroid
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| which tunic contains the photoreceptors? | Retina
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| define refraction | bending of light rays as they pass from one substance to another substance of a different density
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| what is the transparent portion of hte sclera? | cornea
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| list the four parts of the eye that participates in refration | 1.cornea 2.aqueous humor 3.lens 4.vitreous body
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| define aqueous humor | watery fluid that fills anteriorly to the lens
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| define vitreous body | soft jelly like substance that fills posteriorly to the lens
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| what are the two receptor cells of the eye? | 1.rods 2.cones
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| what kind of light do rods function in? | Dark
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| what is the fovea centralis? | tiny depressed area near the optic nerve
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| color blindness results from lack of what? | retinal cones
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| what is the rod pigment? | rhodopsin or visual purple
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| night blindness results from a deficency of what vitamin? | A
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| visual impulses travel through the optic nerve to which part of the brain? | occipital cortex
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| what is the funciton of hte iris? | regulates the amount of light entering the eye
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| is the iris extrensic or intrensic? | intrensic
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| define presbyopia | defficulty focusing on close objects. means old eye literaly
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| list and give the functions of the two sensory nerves that supply the eye. | 1.optic-carries visual impulses from rods and cones to the brain2.ophthalmic branch of trigeminal nerve- pain touch and temperature to the brain
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| define optic disk | blind spot
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| what nerve supplies almost all extrinsic eye muscles? | trochlear nerve
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| define hyperopia and astigmatism. | 1.hyperopia- farsightedness2.astigmatism- curvature of cornea or lens causing light rays to bend causing blurry vision.
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| what is the scientific term for pinkeye? | conjunctivitis
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| what is opacity of the lens called? | cataract
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| what is glaucoma? | excessive pressure of aqueous humor
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| what is the visible external portion of the ear? | pinna
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| where is wax produced? | ceruminous glands in the external auditory canal
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| what is the common name for the tympanic membrane? | eardrum
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| what two parts of hte ear does the tymapnic membrane separate? | external auditory canal and middle ear cavity
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| what isthe name for the three small bones of the middle ear? | ossicles
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| which of hte ossicles comes in contact with the tympanic membrane? | malleus
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| what does the eustachian tube connect> | middle ear cavity with the throat
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| what kind of receptors does the vestibule contain? | equilibrium
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| what is hte coiled division of hte inner ear that contains the receptors for hearing? | cochlea
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| what is the organ of hearing? | organ of corti
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| which of the ossicles is in contact with th oval window of the inner ear? | stapes
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| list the steps in hearing | 1.sound enters external canal2.eardurum vibrates3.ossicles transmit across middle ear4.stapes sends to inner ear5.corti cilia move6.movement of membrane makes nerve impluses7.brain through the 8craninal nerve8.temproal lobe cortex interprets
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| what form of equlibrium do maculae function in? | static equilibrium
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| waht are cristae? | receptors located at base of semi circular canals
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| waht kind of movement do the semicircular canals detect? | different
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| define otitis media | infection and inflammation of hte middle ear cavity
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| what is the common name for otits externa? | swimmers ear
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| difine otosclerosis | bone disorder that prevents the normal vibraion of the stapes
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| on which part of hte tongue are sweet tastes most acytekt experienced? | tip
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| the interpretation of smell is closely related to what other sense | taste
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| waht are the receptors for pain? | skin muscles and joints
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| what are analgesics | meds for pain
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| what are endorphins? | released naturally by the brain associated with pain control
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| define sensory adaptation | receptors adjusting themselves so that a sensation becomes less acute
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Created by:
morganne
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