Lionel is preparing for his first job interview. The night before the interview, he is restless and anxious; his palms sweat and his heart beats faster than usual. in this scenario, Lionel's physiological responses can be best attributed to his sympathetic nervous system (SNS). SNS is mainly responsible for the body’s physiological changes during a fight-or-flight response. After this, an organism’s body return to its rest-and-digest state to build balance mainly caused by parasympathetic nervous systems (PNS).