Vetinerary Assistant Practice Exam

What does the central nervous system consist of?

1. Brain and spinal cord

2. Heart and lungs

3. Digestive organs

4. Kidneys and liver

The correct answer is: Brain and spinal cord

The central nervous system (CNS) is primarily composed of the brain and the spinal cord. This system is responsible for processing sensory information, coordinating movement, and influencing behavior. The brain serves as the control center, interpreting signals from the body and making decisions based on that information. The spinal cord acts as a conduit for signals between the brain and the rest of the body, facilitating reflexes and responses to stimuli. In contrast, the heart and lungs, digestive organs, and kidneys and liver belong to other systems in the body, such as the circulatory, respiratory, digestive, and excretory systems. These organs have distinct functions that do not pertain to the communication and processing roles of the central nervous system. Therefore, the brain and spinal cord are the key components that define the structure and function of the central nervous system.