Afferent neurons transmit information to the CNS.

Efferent neurons transmit information away from the CNS.

• The motor system carries signals to skeletal muscles and is voluntary.

• The autonomic nervous system regulates the internal environment in an involuntary manner.
  • The sympathetic division mediates the "fight-or-flight" response to stress.

  • The parasympathetic division promotes a return to "rest and digest" state.

  • The enteric division controls activity of the digestive tract, pancreas, and gallbladder.