ENT Which of the following physiologic responses occurs as the pitch of a sound is increased? A The frequency of action potentials in auditory nerve fibers increases B Units in the auditory nerve become responsive to a wider range of sound frequencies C A greater number of hair cells become activated D The location of maximal basilar membrane displacement moves toward the base of the cochlea 💡 Explanation Which of the following physiologic responses occurs as the pitch of a sound is increased? ✓ Correct Answer: D. The location of maximal basilar membrane displacement moves toward the base of the cochlea