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| sense sensory systems sensory receptor perception pheromones transduction photon receptor potentials Pacinian corpuscle sensory adaptation chemoreceptors mechanoreceptors chemoreception olfaction olfactory bulb gestation taste buds photoreceptors rhodopsin ocelli compound eyes ommatidia eyestalks single-lens eye pupil retina sclera cornea choroid ciliary body ciliary muscle lens iris dilates retina rods and cones ganglion cells optic nerve optic disc horizontal cells amacrine cells fovea centralis vitreous humor aqueous humor accommodation nearsightedness astigmatism farsightedness retinal opsin lateral geniculate nucleus (LGN) setae tympanal organs echolocation mechanoreception statocysts cycles frequency or pitch auditory canal pinna tympanic membrane maleus incus stapes oval window eustachian (or auditory) tube semicircular canals vestibule cochlea vestigular, cochlear, and tympanic canals basilar membrane hair cells tectorial membrane auditory nerve conductive deafness sensory deafness decibels vestibule cupula ampulla utricle saccule otoliths Pacinian and Meissner's corpuscles thermoreceptors pain receptors |