Confocal micrograph of a peripheral sensory neuron in culture. Marker stains and antibodies are used to identify neurons (red), c-Fos protein (green) and nuclei (blue). Note the nuclear ...

Receptor in the skin detects a stimulus (the change in temperature). Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons ...