Answer:
Hot metal.
Explanation:
Hot metal is the stimulus that allows nervous system and muscular system work together. When the person touch the hot metal, the sensory cells present on the skin sends signals to the central nervous system through sensory neurons. The central nervous system made a decision and order to the muscles of the hand to remove hand from the hot metal or body. These orders are send to the muscles through motor neurons. In this way, both nervous system and muscular system work together.
