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

Fact 2: Learning and behavior are nervous system functions.

Given the two facts above, answer the question "What are the structural and functional units of learning and behavior?" with the following options: 
- electrons
 - neurons
 - bushes
 - nucleus
 - animals
 - nerves
 - proteins
 - complex


 

  neurons       