Final answer:
Signals from sense organs to the brain and spinal cord are transmitted through sensory neurons, which convert physical stimuli into nerve impulses for the CNS to process.
Step-by-step explanation:
Signals from sense organs going to the brain and spinal cord go through sensory neurons. These neurons carry nerve impulses from sensory receptors in tissues and organs to the central nervous system, which includes the brain and the spinal cord. Sensory neurons convert physical stimuli like touch, light, and sound into nerve impulses that travel to the brain for processing.
Sensory neurons also carry information from the environment inside or outside of the body to the CNS. The CNS then utilizes this information to send messages through motor neurons, instructing the body on how to react to the stimuli.
Therefore, the correct answer is C. Sensory neurons.