Answer the following question given this paragraph: 

The oval window passes the vibrations to the cochlea . The cochlea is filled with liquid that moves when the vibrations pass through, like the waves in water when you drop a pebble into a pond. Tiny hair cells line the cochlea and bend when the liquid moves. When the hair cells bend, they release neurotransmitters.


Q: What do the hair cells in the cochlea release when they bend?

 Choices:

- receptors

- hormones

- lipids

- neurotransmitters

A:
neurotransmitters
