New York State Emergency Medical Technician (EMT) Practice Exam

Which two components comprise the central nervous system (CNS)?

1. Cerebellum and brain

2. Brain and spinal cord

3. Cerebrum and meninges

4. Meninges and spinal cord

The correct answer is: Brain and spinal cord

The central nervous system (CNS) consists of the brain and spinal cord. This system is primarily responsible for processing and transmitting information throughout the body. The brain acts as the control center, integrating sensory information, coordinating motor functions, and supporting cognitive processes. Meanwhile, the spinal cord serves as a critical pathway for signals between the brain and the rest of the body, facilitating reflexes and the movement of information. Understanding the structure of the CNS is crucial because it underpins many functions necessary for both voluntary actions and automatic bodily responses. While other components mentioned, like the cerebellum (a part of the brain) and the meninges (protective layers surrounding the brain and spinal cord), contribute to the overall functioning of the nervous system, they do not define the central nervous system itself. The pair of the brain and spinal cord forms the core of the CNS and delineates its primary functions and roles.