While working to restore the roof of his house, Stan feels the rough surfaces of the roof's shingles. What allows Stan to sense the roughness of the shingles?

The correct answer is Specialized neurons in the skin generate action potentials when distorted by the rough surface.

Explanation: Neurons are the cells that make up the nervous system, responsible for conducting, receiving and transmitting nerve impulses throughout the body, causing it to respond to stimuli in the environment, for example. The human nervous system is formed by two groups of cells: neuroglia and neurons.