How does the ear allow humans to distinguish the volume of different sounds?
A) Louder sounds cause larger action potentials than do softer sounds.
B) Louder sounds cause smaller action potentials than do softer sounds.
C) Louder sounds induce a higher frequency of action potentials than do softer sounds.
D) Louder sounds induce a lower frequency of action potentials than do softer sounds.
E) Louder sounds cause larger action potentials than do softer sounds, and louder sounds induce a higher frequency of action potentials than do softer sounds.
Answer: C
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