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