What are the two primary divisions of the nervous system?

• A. Autonomic Nervous System and Somatic Nervous System
• B. Cranial and Spinal Nerves
• C. Sensory and Motor
• D. Central Nervous System and Peripheral Nervous System

Answer: (D)

The main idea is how the nervous system is organized into a processing center and a connected communication network. The Central Nervous System includes the brain and spinal cord, where information is interpreted and responses are planned. The Peripheral Nervous System covers all the nerves outside the CNS, carrying messages between the CNS and the rest of the body, including the skin, muscles, and organs. This division explains how signals travel from sensory receptors to the brain and how motor commands reach muscles or glands. Within the Peripheral Nervous System, you’ll find functional parts like the Autonomic system, which manages involuntary actions, and the Somatic system, which controls voluntary movement and sensation; these are subdivisions of the peripheral network, not the primary split itself. So the two primary divisions are the Central Nervous System and the Peripheral Nervous System.