Definition of cocaine. : a bitter crystalline alkaloid C17H21NO4 obtained from coca leaves that is used especially in the form of its hydrochloride medically as a topical anesthetic and illicitly for its euphoric effects and that may result in a compulsive psychological need.
The inner hair cells transform the sound vibrations in the fluids of the cochlea into electrical signals that are then relayed via the auditory nerve to the auditory brainstem and to the auditory cortex.
In the inner ear, is a spiral organ called the cochlea, and this liquid filled organ is tapered and along its length are a large number of small sensory hairs.These small hairs cause a signal to be generated in the cell supporting the hair and this we interpret as sound.he hearing receptors are also known as hair cells. These are auditory receptors that transform vibrations causes by sound waves into neural impulses that are then transmitted â¦ to the brain through the auditory nerve.