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24 Cards in this Set

  • Front
  • Back
cornea
protects the eye and bends light to focus into pupil (contact goes here)
pupil
hole that lets light in
iris
a muscle that dilates and contracts pupil (colored part)
lens
focuses the light onto retina (glasses mean there's a problem here)
retina
processes and detects visible light, cones and rods are here
fovea
NOT a structure; a PLACE where images center focus
blind spot
place where optic nerve is leaving retina, so no rods or cones
cones (3 things)
-fine detail/color vision
-active in well-lit conditions
-very few
rods (3 things)
-detect black, white, gray
-active in low light
-more rods than cones
feature detectors
IN BRAIN. Neurons that respond to specific features IE) shape, angle, movement
place theory
different parts of the cochlea are designed to detect high or low frequencies
frequency theory
# of waves that hit eardrum determine pitch (low pitch has low frequency)
conduction deafness
physical abnormality (born w/o an ear, eardrum bursts)
nerve deafness
damaged hairs w/i cochlea (more common, like when old people lose hearing)
eardrum
tight membrane that vibrates with waves
auditory canal
carries sound waves from outer ear to eardrum
hammer, anvil, stirrup
concentrate vibrations of eardrum on cochlea's oval window
cochlea
coiled, fluid-filled tube in inner ear; oval window is cochlea's membrane
hair cells
located on basiliar membrane; their movement triggers impulses in adjacent nerve fibers
auditory nerve
formed by converging nerve fibers in inner ear
kinesthesis
the system for sensing the position and movement of individual body parts
vestibular sense
the sense of body movement and position, including the sense of balance
kinesthesis
the system for sensing the position and movement of individual body parts
vestibular sense
the sense of body movement and position, including the sense of balance