Any individual nerve cell.
Any chemical released by a neuron that alters activity in other neurons.
Central Nervous System (CNS)
The brain and spinal cord.
Periperal Nervous System (PNS)
All parts of the nervous system outside the brain and spinal cord.
Autonomic Nervous System (ANS)
The system of nerves carrying information to and from the internal organs and glands.
The branch of the ANS that arouses the body.
The branch of the ANS that quiets the body.
Logic/memory/emotion (largest area).