Messages are sent to the brain or spinal cord from the body via _____ neurons; messages leave the brain and spinal cord via _____ neurons.
A) motor; mental
B) afferent; efferent
C) efferent; afferent
D) internal; external

Question

Quizplus · Accepted Answer

Afferent neurons (also called sensory neurons) send messages from the body to the brain or spinal cord, while efferent neurons (also called motor neurons) send messages from the brain or spinal cord to the body. Therefore, option B (afferent/efferent) is the best answer.

Messages Are Sent to the Brain or Spinal Cord from the Body