Neurons, Hormones, and the Brain

Central nervous system (CNS) - The portion of the nervous system consisting of the brain and spinal cord.
Spinal cord - A collection of neurons and supportve tissue running from the base of the brain down the center of the back, protected by a column of bones (the spinal column)
Peripheral nervous system (PNS) - All portions of the nervous system outside the brain and spinal cord; it includes sensory and motor nerves.
Somatic nervous system - The subdivision of the peripheral nervous system that connects to sensory receptors ad to skeletal muscles.…