Eye And Ear Flashcards
Sensory Adaptation
A decrease in responsiveness to continued stimulation. Ex. Boiling frog
Where eye Action Potential goes
Through optic nerve to occipital lobe
Retina
Back of eye where photoreceptors are
Cornea
White first layer of eye
Lens
Clear rocky thing held in place by ciliary muscle
Ciliary muscle
Muscle that holds lens in place
Aqueous humour
Medium in between Pupil and cornea. Is more liquidy
Vitreous humour
Medium of rest of eye. Jello-y
Fovea centralis
Where most of cones are most concentrated
Sclera
Cornea bit but at the back
Choriod
Blood vessel layer for nourishment
Hyperopia
Farsightedness
Eye is too long, image goes behind back or retina.
Need convex lens
Myopia
Nearsightedness.
Eye too short, image goes in front of retina.
Need concave lens
Astigmatism
Deterioration of lens (irregularly shaped), causes many docs point.
Needs specialized lens
What does sound travel fastest through?
Solids
What do frequency and amplitude measure in terms of sound?
Frequency measures pitch, amplitude measures loudness
Conductive hearing loss
Sound waves have trouble entering ear. Usually a blockage.
Fixed with hearing aids or clearing out ear.
Sensorineural Hearing Loss
Auditory nerve (Cochlea) is damaged. No signal can be sent. Cochlear implants help restore hearing.
Know all parts?
Good
Cataract
Cloudiness of lens
What lens shape changes for?
Ciliary muscles control shape of lens, making it thicker for near viewing and flatter for distant viewing
Ear parts (hearing)
Good
Ear parts (equilibrium)
Good
