Motor neurons deliver signals between which two locations?

• A. CNS and muscles
• B. CNS and sensory organs
• C. CNS and the heart
• D. Sensory organs and the brain

Answer: (B)

Motor neurons primarily deliver signals between the central nervous system (CNS) and muscles. They are integral to initiating and controlling movement, as they transmit impulses from the CNS, which includes the brain and spinal cord, directly to the muscles, enabling them to contract and produce movement. This process is essential for voluntary motor control, as it allows the CNS to communicate with the body's musculature.

The other options relate to different forms of neurological communication, such as sensory pathways, but they do not pertain directly to the function of motor neurons in mediating movement and motor control. Therefore, focusing on the relationship between the CNS and muscles clarifies the primary role of motor neurons in the nervous system.