Which type of nerve carries information from the CNS to the PNS?

• A. Afferent nerves
• B. Efferent nerves
• C. Interneurons
• D. Motor neurons

Answer: (B)

Information flowing from the central nervous system to the rest of the body travels along efferent nerves. These nerves carry motor commands from the brain and spinal cord to peripheral targets such as muscles and glands, producing movement or secretion. In contrast, afferent nerves bring sensory information from the body back to the CNS, and interneurons stay within the CNS to relay signals between other neurons. While motor neurons are the specific cells that execute the command to muscles, they are a type of efferent neuron—the overall pathway from CNS to PNS is described as efferent.