Which neuron carries signals away from the central nervous system?

• A. Afferent Neuron
• B. Efferent Neuron
• C. Interneuron
• D. Motor Neuron

Answer: (B)

The key idea here is the direction of signal flow relative to the CNS. Efferent neurons carry commands away from the brain and spinal cord to effectors like muscles and glands, enabling actions. In contrast, afferent neurons bring sensory information into the CNS, and interneurons connect neurons within the CNS to coordinate responses. While motor neurons are a common type of efferent neuron that stimulate skeletal muscles, the broader term that describes signals leaving the CNS is efferent. So, for signals that travel away from the central nervous system, the correct term is efferent neuron.