Question

the primary means for transmitting messages between the brain and the rest of the body is the

○ endocrine system
○ reflex
○ motor neuron
○ spinal cord

Explanation:

The endocrine system uses hormones (slower, long - term). A reflex is a rapid response loop. A motor neuron is part of the system. The spinal cord is the main pathway for nerve impulses between the brain and the body, transmitting messages.

Answer:

D. spinal cord