LS7C Midterm 2 EXAM QUESTION AND
VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST UPDATE] 100%
GUARANTEED PASS
more rods than cones
fovea - CORRECT ANSWER-center of the visual field where cone cells are most concentrated
rod cells absent (instead rod cells predominate in the periphery)
bipolar cells - CORRECT ANSWER-interneuron (modulate NT release)
adjusts release of NT in response to input from rods/ cones
ganglion cells - CORRECT ANSWER-neuron
transmits action potentials along the optic nerve to the visual cortex in the occipital lobe of
brain
horizontal cell - CORRECT ANSWER-interneuron (modulate NT release)
,communicates with neighboring photoreceptors and bipolar cells
sharpen image
amacrine cells - CORRECT ANSWER-interneuron (modulate NT release)
communicates with neighboring ganglion and bipolar cells
motion detection
Meniere's Disease - CORRECT ANSWER-causes more endolymph fluid in the inner ear
sound transduction in ear - CORRECT ANSWER-1. Sound comes in through auditory canal
2. Vibrates tympanic membrane which vibrates inner ear bones
3. Stapes attached to cochlea at oval window causes perilymph to move (fluid in inner ear)
4. Causes vibration in endolymph in cochlear duct
5. Basilar membrane vibrates --> causes stereo cilia to bend against tectorial membrane
6. Vibrations exit out of round window in order to relieve pressure
inner hair cells - CORRECT ANSWER-decipher auditory information
, outer hair cells - CORRECT ANSWER-responsible for sensitivity or amplification
base of cochlea - CORRECT ANSWER-very outside of the spiral
high frequency sounds
apex of cochlea - CORRECT ANSWER-very inside of the spiral
low frequency sounds
organ of corti - CORRECT ANSWER-found in endolymph of inner ear where the hair cells are
vestibular membrane - CORRECT ANSWER-separates hair cells (where endolymph bathes them)
from perilymph
tectorial membrane - CORRECT ANSWER-stereocilia bend against this when stimulated by
vibration in the basilar membrane --> action potential
kinocilium - CORRECT ANSWER-tallest stereocilia on a hair cell
positive mechanical deformation in hair cell of cochlea - CORRECT ANSWER-mechanical
deformation towards the kinocilium
tiplink tension increases
opens K+ channels; K+ rushes into cell (depolarization)
Ca+ enters cell (vesicles released, NT released)
negative mechanical deformation in hair cell of cochlea - CORRECT ANSWER-mechanical
deformation away from the kinocilium
tiplink tension decreases
VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST UPDATE] 100%
GUARANTEED PASS
more rods than cones
fovea - CORRECT ANSWER-center of the visual field where cone cells are most concentrated
rod cells absent (instead rod cells predominate in the periphery)
bipolar cells - CORRECT ANSWER-interneuron (modulate NT release)
adjusts release of NT in response to input from rods/ cones
ganglion cells - CORRECT ANSWER-neuron
transmits action potentials along the optic nerve to the visual cortex in the occipital lobe of
brain
horizontal cell - CORRECT ANSWER-interneuron (modulate NT release)
,communicates with neighboring photoreceptors and bipolar cells
sharpen image
amacrine cells - CORRECT ANSWER-interneuron (modulate NT release)
communicates with neighboring ganglion and bipolar cells
motion detection
Meniere's Disease - CORRECT ANSWER-causes more endolymph fluid in the inner ear
sound transduction in ear - CORRECT ANSWER-1. Sound comes in through auditory canal
2. Vibrates tympanic membrane which vibrates inner ear bones
3. Stapes attached to cochlea at oval window causes perilymph to move (fluid in inner ear)
4. Causes vibration in endolymph in cochlear duct
5. Basilar membrane vibrates --> causes stereo cilia to bend against tectorial membrane
6. Vibrations exit out of round window in order to relieve pressure
inner hair cells - CORRECT ANSWER-decipher auditory information
, outer hair cells - CORRECT ANSWER-responsible for sensitivity or amplification
base of cochlea - CORRECT ANSWER-very outside of the spiral
high frequency sounds
apex of cochlea - CORRECT ANSWER-very inside of the spiral
low frequency sounds
organ of corti - CORRECT ANSWER-found in endolymph of inner ear where the hair cells are
vestibular membrane - CORRECT ANSWER-separates hair cells (where endolymph bathes them)
from perilymph
tectorial membrane - CORRECT ANSWER-stereocilia bend against this when stimulated by
vibration in the basilar membrane --> action potential
kinocilium - CORRECT ANSWER-tallest stereocilia on a hair cell
positive mechanical deformation in hair cell of cochlea - CORRECT ANSWER-mechanical
deformation towards the kinocilium
tiplink tension increases
opens K+ channels; K+ rushes into cell (depolarization)
Ca+ enters cell (vesicles released, NT released)
negative mechanical deformation in hair cell of cochlea - CORRECT ANSWER-mechanical
deformation away from the kinocilium
tiplink tension decreases
