Fact 1: Neurons are the structural and functional units of the nervous system.

Fact 2: Alcohol depresses the nervous system.

Given the two facts above, answer the question "Alcohol depresses " with the following options: 
- nerves
 - alveoli
 - emissions
 - thirst
 - neurons
 - humans
 - lungs
 - Decibels


 

     neurons    