Auditory Sense (Hearing) Sense organs: ear, cochlea Receptor cell: hair cell, cilia deflect w/sound wave Receptor mechanism: mechanically-gated cation.

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Auditory Sense (Hearing) Sense organs: ear, cochlea Receptor cell: hair cell, cilia deflect w/sound wave Receptor mechanism: mechanically-gated cation channels allow depolarize in one direction, hyperpol in other Coding of intensity and direction: amount and direction of cilia bending, ear coordination Coding of pitch: which hair cells are deflected Pathway of conduction: CN VIII-medulla- thalamus-auditory cortex

*external ear (air) *middle ear (air) *inner ear (liquid) Overall anatomy of the human ear

vestibular cochlear tympanic

Equilibrium Sense organs: semicircular canals with ampullae and utricle and saccule with maculae Receptor cell: hair cell Receptor signal transduction mechanism: cilia with mechanically-gated cation channels allow depolarize in one direction, hyperpol in other Coding of intensity and direction: amount and direction of cilia bending Pathway of conduction: CNVIII-pons-cerebellum

The semicircular canals - detect rotational (angular) acceleration

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