Fill in the blanks to complete the passage about the competing theories about how a sound's pitch is transmitted to the brain.There are two theories that attempt to explain how sound is transmitted to the brain through the vibration of cilia in the ear. The first, ____ theory, suggests that the speed with which the cilia fire neural impulses determines the pitch of sound that is conveyed. The second, ____ theory, suggests that where the cilia are located along the basilar membrane determines the pitch of sound they transmit. This second theory proposes that the primary auditory cortex is organized according to location as well, a concept referred to as _____.

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