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18 Cards in this Set
- Front
- Back
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meibomian gland
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modified sebaceous glands at the eyelid edges that produce an oily secretion that lubricate the eye
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eyelid function
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protect eyes
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eyelashes function
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protect from debris, sensitive to touch
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lacrimal apparatus
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lacrimal glands, located above eye, release tears onto eye, which flush across eyeball
into lacrimal canals, then into lacrimal sac, then nasolacrimal duct, which empties into nasal cavity |
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role of lysozomes in tears
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an enzyme that destroys bacteria, thus cleaning and protecting eye
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organ of corti
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inside cochlea, contains hearing receptors
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hair cells
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embedded in gel
sound waves cause vibrations in cochlear fluid hairs are bent or tweaked, which causes the sound to be heard |
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static equilibrium
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maculae report on position of head in relation to pull of gravity when body is not moving -- otoliths roll in responses to changes in pull of gravity
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dynamic equilibrium
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respond to angular movements of head -- christa ampullaris has cupula, which swing in opposite direction to movement, stimlates hair cells, transmits to vestibular nerve
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mechanoreceptor
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receptors that respond to physical forces, such as movements of the head with balance
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photoreceptor
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eye sight
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chemoreceptor
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smell/taste
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olfactory receptor
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occupy a potage-stamp sized area in roof of nasal cavity
olfactory hairs, continually bathed by mucus, are stimulated and transmit impulses along olfactory filaments to the olfactory cortex of brain |
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four types of tate receptors
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filiform --
fungiform - bigger, rounded circles circumvallate -- top of indentation foliate |
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sweet receptors
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sugar, saccharine, amino acids
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sour receptors
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hydrogen ions, acidity
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bitter receptors
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alkaloids
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salty
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metal ions
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