When Brian touches a hot object, which body structures help him react appropriately to protect himself?

When Brian touches something hot, sensory neurons detect the heat and carry the signal toward the spinal cord. Interneurons relay the signal there, and motor neurons carry a command to muscles so he can pull his hand away. This quick protective response can happen without waiting for the brain to process the signal first, so the correct choice is “the sensory neurons, the interneurons, and the motor neurons.”

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