Which nerves transmit messages from the brain and spinal cord to all other parts of the body?

Which nerves transmit messages from the brain and spinal cord to all other parts of the body?

• A. Sensory nerves
• B. Motor nerves
• C. Autonomic nerves
• D. Interneurons

Answer: (B)

Motor nerves carry commands from the brain and spinal cord to muscles and glands, directing movement and actions. They are efferent pathways in the peripheral nervous system, sending instructions outward from the central nervous system to the body's effectors, especially skeletal muscles. Sensory nerves do the opposite, bringing information from the body to the CNS. Interneurons stay inside the CNS to process and relay information between neurons. Autonomic nerves also travel away from the CNS to control involuntary functions, but the description “to all other parts of the body” most directly describes motor nerves that drive movement and responses.