Question

the reflex centers in the spinal cord are responsible for relaying what type of neural messages?
sensory input over cranial nerves
motor output over spinal nerves
sensory input over spinal nerves
motor output over cranial nerves

Explanation:

The spinal cord's reflex centers are associated with spinal nerves. Sensory input is received, and motor output (response) is sent via spinal nerves for reflex actions. Cranial nerves are more related to the brain - based functions rather than spinal reflexes.

Answer:

motor output over spinal nerves