At the sound of shattering glass, people quickly turn their heads. Discuss how the nervous system functions to

At the sound of shattering glass, people quickly turn their heads. Discuss how the nervous system functions to produce this type of response to an external stimulus.

Well I just talked about the neurons, dendrites, Sodium/Potassium pumps, neurotransmitters..etc. I didn’t know what else to say. Is there something more specific with the nervous system with sound though?