What will happen if Richard’s friend jumps in front of him and scares him? Richard’s central nervous system will take over, and his peripheral nervous system will have a lesser role. Richard’s peripheral nervous system will take over, and his central nervous system will have a lesser role. Richard’s sympathetic nervous system will take over, and his parasympathetic nervous system will have a lesser role. Richard’s parasympathetic nervous system will take over, and his sympathetic nervous system will have a lesser role. Which structure would be unaffected by the peripheral nervous system?