vision 1
what are lacrimal glands?
tear glands
what's the colored part of your eye?
iris
the auricle/pinna & external auditory canal make up the ______ part of the ear
external
describe amplitude & frequency of sound
amplitude - loudness; frequency - pitch
the 3 layers of the eye are:
fibrous, vascular, retina
the choroid is part of which layer of the eye?
vascular
differentiate endolymph and perilymph and where they are located
endolymph - membranous labyrinth; perilymph - bony labyrinth (similar to extracellular fluid like CSF)
place these structures in the order of sound pathway: stapes, tympanic membrane, incus, malleus, cochlea, oval window, round window
tympanic membrane, malleus, incus, stapes, oval window, cochlea, round window
what's the difference between aqueous and vitreous humors?
anterior/posterior
describe the role of the ciliary body
changes shape of the lens to accomodate light
what are the 3 smallest bones in your body (in order)?
malleus incus stapes
describe how sounds are detected within our hearing range?
they vibrate thru the basilar mebrane
describe myopia and hyperopia
nearsighted (eye too long), farsighted (eye too short)
describe the macula lutea and the fovea centralis
center of the retina, highly composed of cones
fovea centralis = center of macula lutea, only cones
why does our ear pressure get messed up when we get a throat infection?
pharyngotympanic/eustachian tube
the basilar membrane detects ____ frequency at the base and ____ frequency at the apex
high frequency, low frequency
describe what causes our blindspot
optic nerve / optic disc creates a blindspot in the retina
describe the order in which the retina communicates messages to the optic nerve
photoreceptors --> bipolar cells --> ganglion cells -> optic nerve
describe the role of the otoliths and stereocilia in detecting vertical/gravitational movement
the otoliths (little rocks) slide along with gravity to create depolarization/hyperpolarization of vestibular nerve
describe the purpose/mechanics behind the macula and crista ampullaris
macula - gravitational acceleration (otoliths); crista ampullaris - rotational acceleration (inertia & fluid)