What are the two main components of the nervous system?

The two main components of the nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system comprises the brain and spinal cord, which serve as the control center for processing information and coordinating responses. The peripheral nervous system includes all the nerves outside the CNS, connecting the brain and spinal cord to the rest of the body. This system is essential for transmitting sensory information to the CNS and relaying motor commands from the CNS to the muscles and glands.

In contrast, the other options focus on specific aspects or subdivisions of the nervous system rather than its primary classification. Motor and sensory nerves are part of the peripheral nervous system but do not represent the entire system. The sympathetic and parasympathetic systems refer to subdivisions of the autonomic nervous system, which operates within the peripheral component. Cerebrum and cerebellum describe parts of the brain, part of the central nervous system, but do not encompass the broader categories of the entire nervous system. Thus, identifying the central and peripheral nervous systems as the primary components provides a comprehensive understanding of the nervous system's structure and function.