Flashcard Set Preview
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| 1 |
Describe the accessory structures of the eye
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Eyebrows, eyelashes, lacrimal apparatus, extrinsic eye muscles
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| 2 |
Describe the components and the functions of the fibrous tunic
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has sclera and corneaSclera: dense collagenous connective tissue with elastic fibersCornea:...
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| 3 |
Describe the strunctural constituents of the three regions of the vascular tunic, while emphasizing...
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choroid: Has blood vessels and melanocytescilliary body: Ciliary processes of the ciliary body...
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| 4 |
Describe the major features and layers of the nervous tuic
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Photoreceptorsbipolar neuronsganglion neurons
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| 5 |
Discuss the funtions of the two types of photoreceptor cells
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rods: specialize for vision of dim lightcones: specialize for vision in bright light, color...
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| 6 |
Describe the structure of the optic disc
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site where optic nerve and blood vessels exit the eyeball axons form the optic nerve
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| 7 |
Describe the structure and function of the lens
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protein fibersloss of transparency= cataracts
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| 8 |
Describe the cavities and chambers of the inner eye and the materials that occupy each chamber
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Anterior cavity: aqueous humor Anterior chamber: Cornea to the iris Posterior chamber:...
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| 9 |
Discuss how the light refracts or bends as it passes through the eye
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Light is refracted by cornea, aqueous humor, lens, vitreous humor
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| 10 |
Define accommodation
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increase in curvature of lens for near vision
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| 11 |
List and discuss the refraction abnormalities
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Myopia (near-sightedness)- eyeball too long to focus properlyHyperopia (far-sightedness)- eyeball...
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| 12 |
Describe the structures of rod and cone photorecptors as wells as the location and differences...
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a colored protein that undergoes structural changes when it absorbs light ...
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| 13 |
List the steps of the configuration changes that occur to the photpigments upon absorption...
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In the dark, ligand-gated Na+ channels are open causing the
photoreceptor to be partially...
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| 14 |
Discuss the sequence of interactions between photopigments, sodium channels, photoreceptor...
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| 15 |
Describe the structures of the external ear
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Pinnaexternal auditory meatusterminates at tympanic membrane
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| 16 |
Describe the structures of the middle ear and their functions
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Middle ear bones: malleus, incus, stapesEustachian tube: auditory tube; opens into pharynx...
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| 17 |
Describe the bony labyrinth adn membranous labyrinth of the inner ear. List the fluids found...
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contains perilymph which is similar in composition to cerebralspinal fluid; the membranous...
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| 18 |
Describe the functions of the vestibule, semicicular canals and cochlea of the inner ear
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for equilibrium
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| 19 |
Describe the internal structure of the cochlea, including the scala, helicotrema, and cochlear...
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scala vestibuli: ends at oval windowscala tympani: ens at round windowConnected in middle of...
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| 20 |
List the steps as sound is transmitted through the structures of the ear adn then converted...
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Sound waves strike the eardrum causing it to vibrate – slowly for low-pitched sounds and...
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