Sensory processing: experience is distinguished between sensation and perception, sensation: the detection of simple stimuli (bright, warm, perception: detection of objects, their location, movement, etc. Seeing the colour red is sensation; seeing a red apple is perception: our sensory mechanisms: visual, auditory, gustatory, olfactory, somatosensory, transduction: sense organs convert energy from environmental events into neural activity. Rate of firing tells how intense a stimulus is: psychophysics: physics of the mind. studies the relationship between physical stimuli and perceptual experience. Indicates people"s ability to detect a particular stimulus. Responsible for our most acute vision: photopigment: a complex molecule found in photoreceptors, when struck by light, it splits and stimulates the membrane of the photoreceptor in which it resides. Audition: ossicle: the 3 bones in the ear: hammer, anvil, stirrup, cochlea: snail shaped chamber where auditory transduction takes place, basilar membrane: contains auditory receptor cells. Within the cochlea: the oval window and round window are both holes in the cochlea with membranes.