Urgent answer jesi is on vacation and visited a seafood restaurant to eat a shrimp dinner. about thirty minutes after eating, she begins to feel ill and her stomach is rumbling. shortly after, she begins to vomit. jesi's body is experiencing a reaction to an stimulus. internal response external biological clock during a stressful or threatening situation, which of the following is the best description of how the nervous systems in your body would respond? the parasympathetic nervous system releases adrenaline and the sympathetic nervous systems calms the system back down.  the parasympathetic nervous system senses the danger and the sympathetic nervous system responds by releasing adrenaline.  the parasympathetic nervous system brings the system back to normal after the sympathetic nervous systems signals to release adrenaline. which of the following scenarios is the best example of positive feedback? as blood pressure decreases, your heart rate increases.  as blood pressure greatly decreases, blood flow decreases, and blood pressure drops more.  as body temperature rises, you begin to sweat.  as body temperature decreases, your body begins to shiver.