Term
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Definition
-large and complex organs
-localized grouping of specialized receptors |
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Term
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Definition
-often exist as individual cells or receptor units
-widely distributed throughout the body |
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Term
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Definition
| -presence of covering capsule |
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Term
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Definition
| -absence of covering capsule |
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Term
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Definition
-type of stimuli required for sight
-rods and cones
-vision |
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Term
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Definition
-type of stimuli required for taste and smell
-olfactory cells for smell
-gustatory cells for taste |
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Term
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Definition
| -type of stimuli required for tissue damage |
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Term
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Definition
| -type of stimuli required for temperature |
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Term
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Definition
-type of stimuli required for pressure or touch
-organ of Corti for hearing
-Cristae ampullares for balance |
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Term
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Definition
| -type of stimuli required for position of body parts or changes in muscle length or tension |
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Term
| Free (Naked) Nerve Endings |
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Definition
-skin and mucosa (epithelial layers)
-pain, crude touch, temperature, itch, tickle
-unencapsulated |
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Term
| Tactile (Meissner) Corpuscles |
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Definition
-skin (in papillae of dermis) and fingertips and lips (numerous)
-fine touch and low frequency vibration |
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Term
| Bulbous (Ruffini) Corpuscles |
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Definition
-skin (dermal layer) and subcutaneous tissue of fingers
-touch and pressure |
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Term
| Lamellar (Pacini) Corpuscles |
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Definition
-subcutaneous, submucous, and subserous tissues; around joints, in mammary glands and external genitals of both sexes
-pressure and high frequency vibration |
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Term
| Bulboid Corpuscles (Krause End Bulbs) |
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Definition
-skin (dermal layer), subcutaneous tissue, mucosa of lips and eyelids, and external genitals
-touch |
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Term
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Definition
-near junction of tendons and muscles
-proprioception (sense of muscle tension) |
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Term
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Definition
-skeletal muscles
-proprioception (sense of muscle length) |
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Term
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Definition
-tough outer coat
-"white" of eye
-protective connective tissue |
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Term
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Definition
-front, clear part
-no blood supply
-heals very quickly
-can get ulcers/lesions
-transparent part of sclera over iris |
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Term
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Definition
| -mucous membrane that lines the eyelids and covers the sclera in front |
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Term
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Definition
-produces tears
-keeps conjunctiva moist |
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Term
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Definition
-middle layer of eyeball
-pigmented vascular layer
-prevents scattering of light
-made up of two involuntary muscles (ciliary muscle and iris) |
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Term
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Definition
-pigmented muscular layer
-circular constricts for high light
-longitudinal dilates for low light |
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Term
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Definition
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Term
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Definition
-magnifying glass
-lies directly behind the pupil |
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Term
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Definition
-innermost layer of the eyeball
-contains rods and cones |
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Term
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Definition
-receptors for night vision
-stimulated by dim light |
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Term
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Definition
-receptors for daytime vision
-stimulated by fairly bright light |
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Term
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Definition
| -surrounds fovea centralis |
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Term
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Definition
| -contains the greatest concentration of cones |
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Term
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Definition
-watery fluid in front of the lens
-located in the anterior chamber of the eye |
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Term
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Definition
-jellylike fluid behind the lens
-located in the posterior chamber of the eye |
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Term
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Definition
-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 eye through optic nerve; point of exit is free of receptors (blind spot)
-visual interpretation occurs in the visual cortex of the cerebrum |
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Term
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Definition
-auricle
-external auditory canal |
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Term
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Definition
-appendage on the side of the head
-surrounds external auditory canal |
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Term
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Definition
-curving tube about 1 inch in length
-extends into the temporal bone and ends at tympanic membrane |
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Term
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Definition
-eardrum
-partition between the external and middle ear |
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Term
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Definition
| -produce a waxy substance called cerumen that may collect in the canal and impair hearing by absorbing or blocking the passage of sound waves |
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Term
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Definition
-ossicles
-oval window
-auditory (eustachian) tube |
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Term
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Definition
-malleus (hammer)
-incus (anvil)
-stapes (stirrup) |
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Term
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Definition
| -separates middle ear from inner ear |
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Term
| Auditory (Eustachian) Tube |
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Definition
| -connects the throat with the middle ear |
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Term
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Definition
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Term
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Definition
-bony labyrinth
-membranous labyrinth |
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Term
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Definition
-filled with perilymph
-vestibule
-semicircular canals
-cochlea |
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Term
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Definition
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Term
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Definition
| -specialized receptor which generates a nerve impulse when head moves |
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Term
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Definition
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Term
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Definition
-sense organs of taste
-contani chemoreceptors (gustatory cells) |
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Term
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Definition
| -larger and differing shaped bumps scattered across the tongue |
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Term
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Definition
-sweet (glucose)
-salty (sodium chloride)
-bitter (poisons)
-sour (citric acid)
-metallic (blood)
-umami (savory, delicious, meats) |
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Term
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Definition
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Term
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Definition
-extremely sensitive
-adapt easily |
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Term
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Definition
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Term
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Definition
| -clearness or sharpness of visual perception |
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Term
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Definition
| -central vision diminishes |
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Term
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Definition
-lens becomes hard
-loses transparency
-becomes milky in appearance
-can be removed surgically |
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Term
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Definition
-nearsightedness
-concave
-too short and wide |
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Term
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Definition
-farsightedness
-convex
-too tall and skinny |
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