Chp 9 - Senses
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| These often exist as indiv. cells or receptor units and are widley distributed throughout the body. | general sense organs
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| These are large and complex organs, localized grouping of specialized receptors. | special sense organs
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| Two other classifications for sense organs | encapsulated/unencapsulated and byt the type of stimuli required to activate receptors
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| What sense does photoreceptors sense? | light
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| What sense does chemoreceptors sense? | chemicals
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| What sense does pain receptors sense? | injury
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| What sense does thermoreceptors sense? | temperature change
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| What sense does mechanoreceptors sense? | movement or deforming of capsule
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| What sense does proprioceptors sense? | position of body parts or changes in muscle length or tension
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| What are these examples of: free nerve endings, meissner's corpuscles, ruffini's corpuscles, pacinian corpuscles. | general sense organs
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| What are the three layers of the eyeball? | sclera,choroid, retina
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| -tough outer coat, "white" of eye, cornea is transparent part over the iris | sclera
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| -pigmented vascular layer prevents scattering of light; front part made of ciliart muscle and iris, colored part of the eye | choroid
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| innermost layer of the eye;contains rods and cones | retina
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| -mucous membrane covering the front surface of the sclera and also lines the eyelid; kept moist by tears found in the lacrimal gland | conjunctiva
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| -transparent body behind the pupil; focuses light rays on the retina | lens
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| WHat is the pathway of light? | lightwaves-cornea-pupil-lens-retina-rods & cones-optic nerve-occipital lobe of cerebral cortex
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| What are the two types of eye fluids? | Aqueous humor and vitreous humor
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| -anterior chamber in front of the lens; water like substance | aqueous humor
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| -in the posterior chamber behind the lens; jelly like | vitreous humor
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| Which layer of the eyeball contains the rod and cones? | The innermost, retina
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| What is the point of exit for the optic nerve known as? | the blind spot
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| Where does visual interpretation occur? | in the visual cortex of the cerebrum
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| What are the functions of the ear? | hearing, equilibrium and balance
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| -more about touch | general sense organs
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| taste, smell, vision | special sense organ
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| General sense organs can be broken down into two groups, what are they? | free and encapusalted
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| What are the three divisions of the ear? | external, middle, inner
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| What part of the ear contains: auricle(pinna), external auditory canal, ends with tympanic membrane? | external
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| What is the tympanic membrane? | ear drum
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| Which part of the ear contains: ossicles, ends at oval window? | middle ear
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| What are the bones that make up the ossicles? | malleus, incus, stapes
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| What is a otitis media? | middle ear infection
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| What connects the middle ear to the throat? | eustachian tube
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| Which part of the ear houses: bony labyrinth, semicircular canals, cochlea? | inner ear
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| Where is perilymph found? | bony labyrinth
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| Where is endolymph found? | membranous labyrinth
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| Where are the cristae ampullaris found? What do they do? | semicircular canals; balance
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| What is the pathway of sound? | sound strikes eardrum, vibrates-ossicles vibrate-oval window vibrates-perliymph vibrates-endolymph vibrates-hair cells bend generating nerve impluse
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| Another word for gustatory cell? | taste buds
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| What are the 4 primary taste sensations? | sweet, sour, bitter, salty
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| Where are chemoreceptors located that are responsible for smell? | epithelial tissue in the upper part of the nasal cavity
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