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The Anatomy of the Eye and Ear- AP Psych (Sensation and Perception)

Terms in this set (16)

Pupil
a small opening in the iris through which light enters the eye; color part
Iris
muscle that expands and contracts to change the size of the opening (pupil) for light
Cornea
transparent tissue where light enters the eye
Blind spot
the point at which the optic nerve leaves the eye and no receptor cells are located there
Optic nerve to brain's visual cortex
carries neural impulses from the eye to the brain
Fovea
central focal point in the retina, around which the eye's cones cluster
Retina
contains sensory receptors that process visual information and sends it to the brain
Lens
transparent structure behind the pupil that changes shape to help focus images on the retina
Pinna
catches sounds waves and channels them to auditory canal
Eardrum
vibrates in response to sound waves
Ossicles
3 small bones in the middle ear that transmit and amplify
Round window
vibrates in response to movement of stirrup; creates waves in fluid of cochlea
Cochlea
a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
Auditory nerve
transmits auditory messages to the brain
Semicircular canals
three canals within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement
Eustachian tube
narrow tube between the middle ear and the throat that serves to equalize pressure on both sides of the eardrum; drains accumulated secretions, infections, or debris
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