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Chapter 11
sense organs
| Term | Definition |
|---|---|
| adaptation | the diminishing of a sensation that occurs after continuous exposure to a stimulus |
| analgesic | drug used to relieve pain |
| aqueous humor | clear, watery fluid that fills the anterior cavity of the eye |
| bony labyrinth | complicated system of passageways within the temporal bone that contains the inner ear |
| chemoreceptors | receptors that react to various chemicals, including odors, tastes, and the concentration of carious chemicals in the body |
| choroid | highly vascular layer of tissue in the eye that supplies oxygen and nutrients to the sclera and retina |
| cillary body | thickened extension of the choroid that secretes aqueous humor |
| cochlea | snail-like structure in inner ear that contains the structures for hearing |
| cones | photoreceptors in the retina responsible for color vision |
| conjunctiva | transparent mucous membrane that lines the eyelids and covers the anterior surface of the eyeball (except the cornea) |
| cornea | transparent extension of sclera that sits over the iris and admits light into the eye |
| eustachian tube | passageway from middle ear to nasopharynx |
| gustation | sense of taste |
| lacrimal gland | small gland that secretes tears |
| mechanoreceptors | receptors that respond to factors that change the position of a receptor |
| nociceptors | pain receptors that respond to tissue damage form trauma as well as form heat, chemicals, pressure, or a lack of oxygen |
| olfaction | sense of smell |
| optic chiasm | point in the brain where half of the optic nerve fibers cross to the opposite side of the brain |
| organ of corti | hearing sense organ |
| papillae | protrusions on the tongue on which taste buds are located |
| photoreceptors | receptors in the eyes that respond to light |
| referred pain | pain originating in a deep organ that is sensed as if it's originating form the body's surface |
| refraction | bending of light rays so that they focus on the retina |
| retina | innermost layer of the eye that contains receptors for vision |
| rods | photoreceptors in the retina active in dim light |
| sclera | outermost layer of the eye; formed form dense connective tissue |
| thermoreceptors | receptros activated by a change in temperature |
| tympanic membrane | membrane separating the outer ear from the middle ear that vibrates in response to sound waves; eardrum |
| vestibule | structure of the inner ear that contains organs necessary for sense of balance |
| vitreous humor | jelly-like substance that fills the posterior cavity of the eye |
Created by:
lindstromjPN110
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